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Mary Holstege

@mathling.mastodon.social.ap.brid.gy
145 followers 1 following 1.1K posts

Retired software engineer. Now I write programs to make art and, lately, make art with words. Will natter on about tech in general with forays into linguistics […] 🌉 bridged from ⁂ mastodon.social/@mathling, follow @ap.brid.gy to interact

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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 18/10/2026
#SilentSunday #Photography
A round tower with a conical slate top stands at the end of a rather handsome pale sandstone facing, also topped with dark slate. Dark algae or mold or something stains the stone of the tower, but the wall is clean. Triplets of (slightly pointed) arched look out over a misty hillside. Our view is along the wall towards the tower, and we are high, almost at the level of the top set of windows. We can't see the base of the wall or tower, and there is the impression of great height extending further down. (A correct impression, that.) The sky is socked in, grey and drippy.

Photographer: me
Location: Rocamadour, France
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 16/10/2026
Land and sea
Two photographs, woven together in stripes. One shows th sea crashing into rocks, and one shows a landscape. Is it turned 90 degrees? Maybe. But then... the sky. It's a little confusing, frankly, and there are reddish rocks from both scenes that just confuse you further.

Photographer: me
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 16/10/2026
#GenerativeArt interlude A cat on a mat in the woods Interleaving pictures, as one does after having cracked the whole SVG image striping problem. #XQuery #SVG #CreativeCoding #HumanArt
A weaving of two photographs: a tabby cat flaked out on a mat, and a look up into the canopy of an old and twisted tree.

Photographer: me
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 13/10/2026
#portfolioDay It's all generative art (generated by programs made by a human). Inspiration from nature, math, writing #XQuery #SVG #HumanArt #CreativeCoding
Asemic writing, perhaps, full of swoops and swirls and dots, An embossed appearance in bronze and silver. A cross between an Arabic and an alien spider vibe.A still life of pomegranates in hexagons of various sizes and shades of grey. Formed by repeatedly breaking down an image, subdividing the areas with greatest variation in brightness and mapping brightness levels to a gradient (here a grey scale gradient).Abstract in bright colours. There are swirling black lines dripping ink over a burnt orange background. Where the loops intersect, some of the regions are coloured: various blues, yellow, a smidge of grey.A study in textures. It looks like leaves in the rain. Shades of grey against a dark background, somewhat grainy appearance. Colophon: a random shape iterated with various shifts and rescalings and opacities.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 11/10/2026
#SilentSunday #Photography
Looking up into the brilliant blue sky along the wall of a church (Sa Llotja in Palma, Spain). Beautiful gothic sandstone gleams in the sun. And are those bullet holes? Why yes, yes, they are. As with everything in Spain, it's Franco's fault.

Photographer: me
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 11/10/2026
#WordWeavers 10/11: Share a passage from your WIP where the setting is doing as much storytelling as the characters. From Crystal Falls (coming soon!) a sci-fi murder mystery (text in alt)
Text reads:
The sun caught the tops of Mount Eos first. Bright flags of brilliance bloomed above them, then steadily crept down from the heights. It was not a monolith, but formed a rank of craggy pillars with wild buttresses and columns of twisted stone. In the rosy light it looked like a fairy castle, ethereal and unreal. Crystals sparkled across the turrets and towers, flashing as the light descended and caught a new set. No. *This* was the most beautiful thing he had ever seen. Zee had done well to find this place, convince him to come. It felt healing. Soothing. A good place to rest. To stop. He felt an easing in his chest, a tightness loosening that he hadn't even known was there.

Then the light hit the plateau, and Cantor realized that no, no, he hadn't seen anything beautiful before at all. In a sudden flush of pink and red, the whole plateau burst into flame. Light bloomed all around them. It was like a flower opening, no, a gentle smile on a lover's face, the first sip of coffee in the morning, a warm zephyr making flowers nod across a meadow. No. It was like nothing he had ever experienced. He felt as if a hand had reached into his chest and squeezed, a goddess had whispered into his ear. *Look at this.* Mount Eos indeed. Goddess of dawn. He felt breathless.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 09/10/2026
An early #Caturday cat trifecta (I suppose I should say, photographer is me for all these.)
A cat sits in a shelter in a catio. The shelter has an entrance in the shape of a cat. A cartoonish black cat figure interweaves through the photograph, as if it were part of the catio. A turducken of cats, if you will.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 09/10/2026
Homage to The Blank Signature An experiment with image slicing an interleaving. You would not believe the trouble I had to go through to get the strips to abut without gaps. No, starting one strip where the last ended was not good enough.
A cartoonish black cat with green eyes peers our in a birch forest, interweaving through the trees.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 09/10/2026
#GenerativeArt interlude Generative cat #XQuery #SVG #CreativeCoding #HumanArt
Wide-eyed cartoonish black cat over a vibrant bed of succulents. It looks a little nervous.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 07/10/2026
#WordWeavers Oct 7: Share a line of dialogue that tells us everything we need to know about a character's personality. From Cantata Deeps, Anselm explains his selling technique.
Text reads: 
Anselm chuckled. "Ah, my lad, my lad. What is truth, hey?" In response to Cello's frown, he added in a more serious tone. "Something destroyed the freighter. Was it a gas leak? Maybe. Was the captain old and crusty and set in his ways? Most likely. Most of them are." A little smile directed towards Pettrie. "Did I ever claim my story had anything to do with those sensors? I did not. The young man asked and I raised my eyebrows and glanced towards them, and they all assumed that it did. People want to believe, lad. They want to think the universe is filled with tidy narratives, to feel the breath of the divine, and touch wonders inexplicable."
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 04/10/2026
#SilentSunday #Photography #Coyote
A coyote rests in the shade on the edge of a dry meadow. We stand on a nearby trail. Not far off we see the cars of the parking lot. He's just chillin', keeping an attentive eye on those ground squirrels, so fat and tempting.

Photographer: The Cat Whisperer
Location: Cupertino
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 30/09/2026
Madness, poetry, love, and rage. Solae, constructed to be the Jade Emperor's spy, flies out on a secret extended mission. Between command directives that bind them, assassins, traitors, and the mind- and body-stealing Thanarchs, they struggle to control […] [Original post on mastodon.social]
The cover of the novel "How Deep the Light of Stolen Suns" by Mary Holstege. The image is dominated by a bright halo of golden light. Clumps of stars fall towards it, made dark by its brightness. Just coming into frame on the left is the silhouette of a spaceship. It has a large bulb at the front and a long thin tail. There are a series of delicate petals perpendicular to the shaft, fanned out into a flower or star.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 27/09/2026
#SilentSunday #Photography
Brass and red velvet. It looks a little steampunk, or something from the Time Machine. It's a telescope, about the size of a small cannon, fixed between two concrete piers, in a small plush room, with the plush velvet armchair providing a comfy perch. Look closer. There is a track for the comfy chair, so it can always be in position. Also, the back can flip to the other side. The astronomer will always have a nice spot to sit. The telescope can only move up and down (and around) not left and right: it is for determining time.

Less comfortable for the astonomer, the phone line, not quite visible. Anyone in the country could call it, at any time, and get the current accurate time. 

Photographer: me
Location: Royal Observatory, Madrid
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 26/09/2026
#Caturday #Photography Nyx, totally invisible
The back haunches of a black cat -- a rather beefy black cat it must be said, with a thick, muscular tail -- sticks out from under a Persian rug. She is hiding, hiding so excellently well. No one will be able to find here here.

Photographer: me
Cat, hiding most excellently, don't listen to the naysayers: Nyx
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 26/09/2026
This is to signify that Blotrz has passed his plasma blaster markmanship test in the Centauran Fleet.
It's alien writing, that's what it is. Spidery loops and whorls and flourishes and dots in dense clusters across the page. Old gold and pinkish red embossed on a maroon background. It is Blortz's certificate, certainly, and they are most proud of it.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 26/09/2026
#GenerativeArt interlude WIP: so not the vibe I was aiming at I set a parameter hilariously wrong, but I kinda like it, so I rolled with it #SVG #XQuery #CreativeCoding #HumanArt
Spidery looping clusters of writing. Is it writing? Lines of text? They almost look like lines of text, but with large gaps. There are looping strokes, and dots and little marks. Arabic? No. Not Arabic. Something stranger. Eerie. Alien. Green and yellow. Does the colour signify?
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 23/09/2026
#GenerativeArt interlude Mountains of madness A quick sketch, using simple geometry and bold colours #XQuery #SVG #CreativeCoding #HumanArt
A teal sky and and orange plain covered with sharp peaks, brilliantly lit (white, pale yellow) on the right face, cross-hatched red shadows on the back face. A pale sun shines high in the sky. 

It is very simplistic, childish even, and yet even so there is something evocative about it. We're in the desert southwest, facing a long hot day of hiking.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 22/09/2026
#ScribesAndMakers 9/22 Promotion day Releasing in a week: How Deep the Light of Stolen Suns Madness, poetry, love, and rage. It's a bit of an insane ride. Adventure. Love. Clones. Artificial people. Mind-and body- stealing space pirates. Poems. Lots and […] [Original post on mastodon.social]
The cover of the novel "How Deep the Light of Stolen Suns" by Mary Holstege. The image is dominated by a bright halo of golden light. Clumps of stars fall towards it, made dark by its brightness. Just coming into frame on the left is the silhouette of a spaceship. It has a large bulb at the front and a long thin tail. There are a series of delicate petals perpendicular to the shaft, fanned out into a flower or star.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 20/09/2026
#SilentSunday #Photography #BloomScrolling
Close up of some pale pink flowers. They are tubes widening into fluffy flares, just about the size of a large bumblebee.

Photographer: me
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 19/09/2026
#Caturday The tuxedo tom that roves our neighbourhood
Tuxedo cat, a tom, sits on a fence, considering his next move. He's a fairly handsome devil, despite being a little beat up. He roams widely and doesn't come near, disappearing for months on end and then making brief appearances.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 14/09/2026
Separated scan lines probe for values above a certain cut-off. We remove or consolidate shorter segments, colouring by the start points. Hilarity ensues.
Here the palette is tropical, aqua, red, orange, and the pale of Caribbean water. The background runs through aslant them from the darker blue to the paler with the reds and oranges in between. There are a series of horizonal lines, mostly long dark blue, but for a few thin bands to the right and in an arc at the top, where tiny fragments of lines in red and orange cluster. Ribbons turning in the warm ocean breezes. A ballerina en pointe. The trailing leg and tail of an antelope.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 14/09/2026
It begins with a fractal noise field, based on a different fractal noise field for the generators Dark ripples
Silver and black ripples over a slanting grey gradient, lighter in the top-left corner, darkening to the lower-right. The ripples are formed from arcing lines of varying lengths, creating a churning series of waves of froth and deep puddles.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 14/09/2026
#GenerativeArt interlude Colour and flow #XQuery #SVG #CreativeCoding #HumanArt
The palette is a series of bold colours: cadet blue, rust, tan. The background paints these in a gradient from blue in the top left to red in the bottom right. Across the background are a series of horizontal lines, also in these colours, of various lengths, with gaps. The long lines tend to be blue, creating wide bubbles surrounded by bands of lighter tan and rust froth. Abstract, but the eye -- always -- looks for form and meaning. A dancer, reaching back over their head? A map of islands? Surf rolling in?
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 13/09/2026
#SilentSunday #Photography
Luscious ripe grapes dripping in clusters from an arbor. The sky is bright blue beyond.

Photographer: me
Location: Real Jardín Botánico de Madrid
Weather: Hot as Hades
Grape-snatching temptation: Extreme
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 12/09/2026
#Caturday #Photography Once again, Nyx demonstrates her superior stealth
Black cat hides under a throw blanket draped over the side of a loveseat. That is to say, she conceals her head. The whole vast back end is hanging out into space.

Photographer: me
Cat: Nyx, Mistress of the Night, Fierce Huntress, Totally Not a Big Old Goof How Dare You Suggest it I Will Claw out your Eyes in your Sleep Foolish Ape Mortal
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 06/09/2026
#SilentSunday #Photography
A bright parakeet tilts its head to look at us from a branch. Green foliage gleams in the bright sun.

Photographer: me
Location: Real Jardín Botánico, Madrid
Temperature: Venusian
Jet Lag: Extreme
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 05/09/2026
#Caturday #Photography Blep
Fluffy old grey cat sticks his tongue out. My goodness, what a long, pink tongue you have. The fangs are pretty impressive too.

Photographer: the Cat Whisperer
Cat: Dusty
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 03/09/2026
Some parameters create distinct patterning, like the skin of a reptile or waves in the sand /Fin
Loops of coloured motes, pink and pale cream over a black background. The motes gather into two knotted fat loops. Within the loops you see waves of motes, overlapping, along the knot ends, little triangular cascades, snakeskin.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 03/09/2026
Take a closed Hobby spline over some random points Pick points along it to be the head of each swoop Exponential fade out of size and spacing of following motes Perpendicular spread out from main track (also faded in size/spacing + some jitter) Appearance […] [Original post on mastodon.social]
The curves have fragmented into individual swoops. It is like the tracks of fireflies in a strobe. See them dance and play in the night: light blue and white.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 03/09/2026
Smaller dots, stronger fade-off: shimmering dust
Swoops and curls of purple and teal dust. There are repeated trains of motes, fading away from the leader, and curls of dust falling away from the main track. It looks almost braided in texture. Black background.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 03/09/2026
#GenerativeArt interlude Swooping motes of light #XQuery #SVG #CreativeCoding #HumanArt
Swirls of bright dots over a black background: pale yellow and pinkish. The swoops expand and contract, and seem to have a triangular pattern of fading from larger to smaller, rather like the patterning of a snake, perhaps. Along the boundaries we get a distinct sense of regular series, led off my one larger dot with a tail streaming in its wake.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 30/08/2026
Available for pre-order now! books2read.com/u/ba7oNv Madness, poetry, love, and rage. Solae, an artificial person created as a spy for the Jade Emperor, is sent on a secret extended mission throughout the Empire. Between command directives that bind […] [Original post on mastodon.social]
Cover of the book "How Deep the Light of Stolen Suns" by "Mary Holstege"

The background is a golden halo with rays coming from it. Clumps of stars converge on the central light. To the left, tiny at this scale, is the silhouette of a space ship, with a bulbous front and a long tail with a florette of spikes coming from it. We can't see the end of the spaceship.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 30/08/2026
Once again, it is amazing to me how the human mind will choose to interpret a few simple strokes as a living thing, even with unrealistic colour and lighting
A scattering of pines, pale brown in the foreground but greener in the background, across a silvery plane that fades to white in the distance. Some of the pines have seen much better days, and are missing a lot of intermediate boughs.

Such is the luck of the draw in randomized numbers of branch clusters and their distributions.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 30/08/2026
A series of quad Béziers, arranged in fans up and down the trunk. Trunk and swoops fattened out into polygon strokes. Scaling by distance from focal point. Now, with a bit of foreground framing:
The flaming forest. Elegant pines the colours of sunset, march away into the distance. In the foreground, a dark and gnarled tree limb.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 30/08/2026
#GenerativeArt interlude Algorithmic pines #XQuery #SVG #CreativeCoding #HumanArt
Trees march away into the distance, in various unrealistic shades of green. They have swooping boughs, reminiscent of pines. The background is grey, shading from light at the top to dark at the bottom.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 30/08/2026
#SilentSunday #Photography
We are in a darkened room. There is a small slanted wooden desk in front of a window. A book lies open on it. A tome, with an illustration on the right hand page. There is a candlestick on the windowsill. The window is bright and offers us a view of a greenery: cypresses, and a steep hill beyond, a few pink flowers in the foreground. The sky is so bright as to be white.

It is a monk's cell, and it doesn't seem like a terrible place to spend your days in silent contemplation.

Photographer: me
Location: Valldemossa, Spain
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 29/08/2026
#Caturday #Photography "What?! There's a magic wall between me and that rodent?!" -- Halki, probably
Little flame point cat paws at the image of some little rodent on the TV. Someone helpfully moved a table up close so she could reach.

Photographer: me
CatTV chooser: The Cat Whisperer
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 23/08/2026
#SilentSunday #Photography #TurduckenArchitecture
The Valencia Cathedral against a gloaming sky. This is a real turducken bit of architecture, from the gothic arches on the front door, to the series of roman arches off to the side, some with Ionic capitals, some Doric. And let's not miss the Islamic star above the main entrance or the chunky octagonal tower. Or, ooh, a dome a la Duomo in Florence lurking in the background. All in all a fitting place for the (alleged) Holy Grail.

Photographer: fellow traveler on the Betchart eclipse expedition
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 22/08/2026
#Caturday #Photography A pleasant day in the sun
Old fluffy grey cat sits upright on a stone path in the sun, his face turned towards us. A dense tangle of flowers and shrubs surrounds him. There are lizards to think about chasing, and hummingbirds. But perhaps just soaking in the warmth on this stone and sniffing the breezes is about the right speed. Leave the pouncing to the kittens.

Photographer: The Cat Whisperer
Cat: Dusty, Best Cat Ever
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 20/08/2026
Piracy is a bloody business I am pleased beyond reason with how the waves came out #SVG #XQuery #CreativeCoding #HumanArt
A pirate ship sails over bloodred seas, lit by one bright moonbeam. The sails are black and menacing.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 20/08/2026
#GenerativeArt interlude One moonlit night
A pirate ship sails a silvery sea, lit by a moonbeam. The waves ripple gently. The sails are stretched, but is there any wind to catch them? It hardly seems so. The horizon is lost in mist.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 17/08/2026
Spring downpour It's all a study in gradients and lighting. I'm pretty fond of those trees, though.
Fat green raindrops fall at a wind-driven angle across a grove of trees. The grass is green, the sky bright.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 17/08/2026
#GenerativeArt interlude Trees in the rain #XQuery #SVG #CreativeCoding #HumanArt
Fat silver raindrops fall against a deep blue background. There are shadows of trees lost behind the downpour. A cold, wet night.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 16/08/2026
#SilentSunday #Photography #Valencia
It looks like a futuristic sci-fi city (and has been used as a set for same), but it is not: just buildings constructed with a very naturalistic sensibility, like the skeleton of a whale with curving branching pillars splayed to the sides and a curved open vault over some greenery to the left. Everything is white, set off against a pale blue pool in between the two arcades and the crisp blue sky. Marvelous from every angle.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 15/08/2026
#Caturday #Photography "I've seen things, kid, you wouldn't believe." -- Dusty
Old fluffy grey cat sits in a box, head erect. He had green eyes, looking towards us but downwards.

Photographer: the cat whisperer
Cat: Dusty
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 14/08/2026
Totality was pretty damned magic too
There is a hole in the sky. The eclipsed sun sinks towards the sea. The photo does not do this justice, washing out the delicacy of the white corona and the red prominences. As Jim Bell said: this is a monkey-brain moment. Just look and marvel that we are lucky to live in a time and place where this is possible. 

Photographer: me
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 14/08/2026
Maybe you're tired of eclipse photos, but this crescent sun sinking into the sea was magic #eclipse #photography #Majorca
A crescent sun sets into the sea to the left. There is a scattering of hazy clouds and the whole sky is red. To the right we see cliff vegetation in the foreground, and in the distance more of the island. A sailboat drifts on the water. 

Photographer: me
Location: Majorca
Emotions: buzzing
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 09/08/2026
#SilentSunday #Photography
We look down towards a hill town.  Central is a thin square tower in white stone. The hill behind is heavily karsted. 

Wait. Is that a dinosaur in the foreground? It is! A velocoraptor. With a hump?!
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 02/08/2026
#SilentSunday #Photography #sfba
A view of the Golden Gate bridge from Angel island. The fog is just starting to burn off, but the tops of the bridge are still lost in the haze. The water is a sparkling aqua, a few whitecaps. There is a lone sailboat forging ahead, sails full-bellied. We get just a bit of vegetation in the foreground. Just another spectacular day on the Bay.
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Mary Holstege @mathling.mastodon.social.ap.brid.gy · 02/08/2026
#Caturday #Photography Halki knows she's soooo cute
Close up of the head of a snoozing flamepoint white cat with one paw curled up over her face. You can see he little pink nose. And her cute orange ears.

The truth behind the lies: somehow a tiny little pony of a cat is taking up the whole damned couch. 

Photographer: The Cat Whisperer
Cat: Halki
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