iiinova — where your digital self keeps evolving

Reposted by Lionel Lemarié

Robin-Yann Storm @rystorm.com · 30/09/2026

My Blendercon Lightning talk "OpenUSD: Don't Worry About It!" is now also available in text if you prefer reading: rystorm.com/blog/openusd... And with a fixed video, without Google Slide glitches: www.youtube.com/watch?v=P8Kp... Huge thanks to the Blender folks for allowing me to fix the video!

Me on stage, with my fist up, and a slide saying "Don't worry about it!" with me putting a thumbs up

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Lionel Lemarié @hikey.org · 02/09/2026

Wow, your latest series of renders is exceptional! Love the different volumetric effects.

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Lionel Lemarié @hikey.org · 03/08/2026

It's just for the progress bar, right? Does it even really need to be thread safe? 😬

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Lionel Lemarié @hikey.org · 03/08/2026

Looks amazing! A ray tracer in your own language, that's a serious nerd melting pot... Love it. Question about performance: looks like there are an awful lot of mutex locks. How much faster would it run without those? Maybe it doesn't matter because it's a shiny toy renderer, but I'm curious...

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Garrett Johnson @gkjohnson.bsky.social · 27/07/2026

New random sampling method for three-gpu-pathtracer: blue noise dither sampling! It offsets a common random sequence for ALL screen samples, yielding a cleaner image in just a few samples. Screenshots are single sample scrambled sobol vs blue noise. Small writeup below👇

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Reposted by Lionel Lemarié

Will Koehler @willk3d.com · 28/05/2026

One of the weirder things I made for Keeper was a faux fractal generator in substance designer. These were used as alphas for sculpting and some VFX. #gameart

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Reposted by Lionel Lemarié

Nelarius @nelarius.bsky.social · 24/05/2026

Sharing my tiny #voxel editor app that I've been working on for the past year: polycube.app It has nice-looking color sliders, three different brushes and a #raytracing renderer with a built-in denoiser ✨ Looking to keep updating it, still so many things on the to-do list! 📋

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Lionel Lemarié @hikey.org · 13/05/2026

My vote: Californian Pepper Tree

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Reposted by Lionel Lemarié

nicebyte @nicebyte.bsky.social · 12/04/2026

INTRODUCTION TO SPHERICAL HARMONICS FOR GRAPHICS PROGRAMMERS finally done. gpfault.net/posts/sph.html

gpfault.net

Introduction to Spherical Harmonics for Graphics Programmers

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mamoniem, et al. 🌹♠️🦷🌿 @mamoniem.bsky.social · 08/04/2026

Behind the pretty frames of #PRAGMATA. Breaking down many tricks and hidden gems of the renderer behind CAPCOM's RE Engine. i hope you enjoy & find this few months worth of freetime article useful... mamoniem.com/behind-the-p...

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Reposted by Lionel Lemarié

Rune Skovbo Johansen @runevision.bsky.social · 30/03/2026

My erosion filter is out! Video, blog post, and shader source. It emulates erosion without simulation, so it's fast, GPU friendly, and trivial to generate in chunks. Explainer video: www.youtube.com/watch?v=r4V2... Companion blog post: blog.runevision.com/2026/03/fast... #ProcGen #vfx #GameDev

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Lionel Lemarié @hikey.org · 28/02/2026

That looks amazing! I wanted to try to replicate it. This is the closest I've got so far.

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Reposted by Lionel Lemarié

Jure Triglav @juretriglav.bsky.social · 19/02/2026

The #WebGPU global illumination engine is getting somewhere, now with volumetric light shafts (00:58) and fully destructible environments. Sorry about the mouse cursor, that's how you know it's real, AI would _never_.

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Reposted by Lionel Lemarié

David Peipei @davidpei.bsky.social · 18/02/2026

Got some time to spend on the pathtracer denoiser. It's getting there, and the next step is to fix those disocclusion artefacts. I will start working more and more on this project, and share more info hopefully soon! #rust #webgpu

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Lionel Lemarié @hikey.org · 15/02/2026

For contrast, here's a naive attempt in my renderer. I'd say it clearly demonstrates how amazingly clean yours is...

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Lionel Lemarié @hikey.org · 15/02/2026

Wow that looks amazing! Each time I'm still blown away by how responsive the lighting is in your renderer.

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Lionel Lemarié @hikey.org · 14/02/2026

Linux support works really well! Superb job. Keyboard support is a tricky one, though. bsky.app/profile/hike...

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Lionel Lemarié @hikey.org · 14/02/2026

They work now! thirteen.h and tinybvh.h make for quick and easy multiplatform ray tracing (: Here's Ubuntu and macOS.

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Lionel Lemarié @hikey.org · 14/02/2026

Sorry, I wasn't clear. When it's realtime at 1spp, it's super noisy. This video has lots of accumulated samples and took overnight to render. Very minimal denoising here.

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Lionel Lemarié @hikey.org · 14/02/2026

That's on my Metal ray tracing renderer, using GPU hardware acceleration. So it only took overnight to render... Rendering 1spp is pretty fast (easily realtime), but there's plenty of room to improve convergence and denoising.

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Lionel Lemarié @hikey.org · 14/02/2026

The final boss for this mini-renderer. Zorah and a (minified) Moana island. TinyBVH makes it almost too easy.

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Lionel Lemarié @hikey.org · 14/02/2026

It's the other way around: I normally shrink a thing to voxel size and build a Sponza scene out of it! bsky.app/profile/hike...

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Lionel Lemarié @hikey.org · 14/02/2026

Unbelievable but true: this renderer also works with non-Sponza scenes!

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Lionel Lemarié @hikey.org · 14/02/2026

Ah oops, I created my own threads like a noob (:

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Lionel Lemarié @hikey.org · 14/02/2026

thirteen.h + tinybvh.h = easy pt

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Lionel Lemarié @hikey.org · 13/02/2026

It takes no time to use the week-end code with thirteen.h! 🤣

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Lionel Lemarié @hikey.org · 11/02/2026

It's hard to make it look good, but it's pretty easy to make it look weird... ShaderToy Wcd3W2 by Shane.

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Lionel Lemarié @hikey.org · 10/02/2026

Live interaction: it reacts pretty quickly in a nice open scene like this.

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Lionel Lemarié @hikey.org · 10/02/2026

Nice, it worked easily in a quick test.

Path traced scene with a shader as the sky. Shader from Xor: https://www.shadertoy.com/view/3fKSzc

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Lionel Lemarié @hikey.org · 09/02/2026

That looks amazing! And the lighting is incredibly reactive. Nice one. Inspires me to add it to my renderer too, although it won't look nearly as good.

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Reposted by Lionel Lemarié

Ipotrick @ipotrick.bsky.social · 04/02/2026

I think most raytracing effects and denoisers don't really think about needs of fast games like shooters. For my RTGI denoiser, i put in a lot of care to get an immediately readable and stable image from the first frame after dis-occlusion. its very satisfying.

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Reposted by Lionel Lemarié

Jure Triglav @juretriglav.bsky.social · 29/01/2026

New post on how to do real-time diffuse global illumination using surfels and #WebGPU: juretriglav.si/surfel-based... #threejs

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Lionel Lemarié @hikey.org · 22/01/2026

This was a fun quick experiment: Using an old photo I took in the forest, I used ml-sharp to generate gaussian splats from it, voxelized it in my toy renderer, relit the scene dramatically. #rendeting #metalrt

Original: an old photo I took in the forest

3D voxelized scene in the day with volumetric fog.

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Amélie Heinrich @dispatchgraph.bsky.social · 20/01/2026

Switched from ImGui to SwiftUI

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Lionel Lemarié @hikey.org · 20/01/2026

Coloring a fractal is interesting in itself. Finding good colors is tricky. Applying them to the "right parts" is tricky. Here's a comparison of off-white vs a value that's displaced relative to the folding for each iteration (then mapped to a color ramp). #fractals #rendering #metalrt

$Path-traced render of an off-white folded fractal.$ $Path-traced render of a colorful folded fractal.$

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Reposted by Lionel Lemarié

JMS55 @jms5517.bsky.social · 19/01/2026

Ok, so I'm completely stuck trying to debug this. Left is pathtraced reference, right is my realtime renderer. Top row are metals, bottom row are dielectrics, and roughness goes from 0 to 1 left to right.

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Lionel Lemarié @hikey.org · 16/01/2026

Render a fractal in 2 easy steps. 1. Render a sphere. 2. Render the rest of the... fractal. #rendering #metalrt

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Lionel Lemarié @hikey.org · 16/01/2026

No, this is classic ray marching IFS. In the distance function, take your position: mirror with abs(), rotate a bit, offset a bit, repeat for a few iterations.

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Lionel Lemarié @hikey.org · 16/01/2026

How to render a fractal in two easy steps: 1. Render a fractal. 2. Fold it into a fractal. #rendering #metalrt

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