iiinova — where your digital self keeps evolving

Filip Rachůnek

@rachunek.com

42 followers 9 following 174 posts

📖 Get my Godot 4 book: bit.ly/godot4book 😎 Follow my YouTube channel: www.youtube.com/@FencerDevLog I have a passion for crafting games, designing 3D assets, composing music, and sharing insightful tutorials on these subjects.

Posts Replies Media

Filip Rachůnek @rachunek.com · 28/09/2026

Hello, everyone! Let’s again create a spatial shader for a 3D object. This tutorial is special because for the first time I will touch on a function that I have completely ignored so far. It is the function called light, and I will show how we can work with it. www.youtube.com/watch?v=iJGX...

Godot 4: Custom lighting in 3D (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 21/09/2026

Hi everyone! I think after several relatively long videos, it would be nice to do something simpler for a change. We’re going to program an effect that simulates looking at an image through square-shaped curved glass. www.youtube.com/watch?v=Bv_K...

Godot 4: Square glass shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 14/09/2026

Hi everyone! Maybe you remember the first tutorial I published this year, which demonstrated a simple algorithm for distorting an image divided into tiles. This time, we'll take that idea a step further and create a wall made of differently distorted glass bricks. www.youtube.com/watch?v=mXFP...

Godot 4: Glass wall shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 07/09/2026

Hello, everyone! It seems that the cave tunnel shader I created here recently was quite successful, which pleased me enough that I decided to add another effect based on a similar principle. So, let's take a look at how we can program it. www.youtube.com/watch?v=vfmB...

Godot 4: Refraction tunnel shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 31/08/2026

Hello, everyone! We previously looked at a shader that generated spiral-shaped objects, but back then it was just an elementary implementation. This time, let’s try something more practical, namely a distant view of a spiral galaxy. www.youtube.com/watch?v=n3TL...

Godot 4: Spiral galaxy shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 24/08/2026

Hello, everyone! Let's expand our collection of tunnel effects with another shader. This time, we'll try something more irregular that could resemble flying into some unknown cave. www.youtube.com/watch?v=d-oo...

Godot 4: Cave tunnel shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 17/08/2026

Hello, everyone! I’ve created a shader here before that simulated a simple animated star. This time, we’ll take that creation to the next level and create a much more interesting type of star using a somewhat more complex approach. www.youtube.com/watch?v=unKl...

Godot 4: Animated star shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 10/08/2026

Hello, everyone! Let's create an effect that resembles boiling lava viewed from above. It's also a great demonstration of using four-dimensional noise and slicing it into three-dimensional layers, resulting in the characteristic flowing lava animation. www.youtube.com/watch?v=95GQ...

Godot 4: Animated lava shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 03/08/2026

Hello, everyone! For the third time, we'll be working with a shader based on a line graph with many vertices. This time, we'll program an effect that loosely resembles a seismograph or another instrument with a similar display. www.youtube.com/watch?v=pvZq...

Godot 4: Seismograph shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 27/07/2026

Hello, everyone! In the previous video, we created a simulation of an electrical discharge using a line with multiple segments. This time, we'll create something like an ECG monitor that displays the characteristic heartbeat waveform. www.youtube.com/watch?v=GgG8...

Godot 4: Heart monitor shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 20/07/2026

Hi everyone! Let's create another 2D effect that we can use in a game as an obstacle or an energy weapon. We'll program an animated jagged line that resembles a lightning bolt or an electrical discharge. www.youtube.com/watch?v=vmCY...

Godot 4: Electric wave shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 13/07/2026

Hello, everyone! Let’s again create a spatial shader for a 3D object. This time we'll create a simple flag, make it wave gently in the wind, and demonstrate how we can dynamically control this effect in the vertex function. www.youtube.com/watch?v=d1y8...

Godot 4: 3D flag waving shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 06/07/2026

Hi everyone! Let's make something simple, because it's the beginning of July, and I'd rather relax than program overly complex shaders. We'll create a simple image warp effect that fits into a single line of code. So let’s go ahead and program that one line. www.youtube.com/watch?v=LliK...

Godot 4: One-line image warp shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 29/06/2026

Hello, everyone! In this tutorial, I’d like to return to simple effects that don’t require any image input. This time, we’ll create something like an animated nebula, which can be an interesting visual enhancement for many space games. www.youtube.com/watch?v=xP9d...

Godot 4: Stormy nebula shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 22/06/2026

Hello, everyone! After the previous tutorial, where we reached a new record of 25 parameters, let’s take a look at something simpler. We’re going to create an effect that belongs to the category of scene transitions and resembles wiping a blackboard with a wet sponge. www.youtube.com/watch?v=Muhe...

Godot 4: Sponge wipe shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 15/06/2026

This is the second part of the tutorial in which we create a shader for simulating old film projection in Godot 4. This time, we will complete the entire effect by enhancing it with various scratches, stains, and other types of damage that can appear on film strips. www.youtube.com/watch?v=ycSX...

Godot 4: Vintage film shader, part 2 (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 08/06/2026

Hello, everyone! We already had a shader that transformed an image into an old photograph, and this time we’ll take that effect to the next level. I’ll show how a similar approach can be used to simulate old film played through a low-quality projector. www.youtube.com/watch?v=NwTU...

Godot 4: Vintage film shader, part 1 (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 01/06/2026

Hello, everyone! This time let’s make something a bit simpler, so we can take a break from overly long videos. I will create an infinite tunnel using a so-called Menger sponge, which is a three-dimensional fractal that we'll project onto a two-dimensional plane. www.youtube.com/watch?v=-B_r...

Godot 4: Menger tunnel shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 25/05/2026

Hello, everyone! On this channel, I’ve been creating Godot shaders of all kinds, but there’s one type I’ve ignored until now - so it’s time to fix that. It’s the shader_type particles, and as the name suggests, we’ll apply it to a GPUParticles3D node. www.youtube.com/watch?v=Fmc1...

Godot 4: Particle shader in 3D (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 18/05/2026

Hello, everyone! The shader we’re going to create in this video definitely isn’t one of the most useful effects for game development. So let’s take a look at how to program a four-dimensional cube. www.youtube.com/watch?v=E8xT...

Godot 4: 4D hypercube shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 11/05/2026

The effect we’ll be creating in this video is something I had been planning for a long time, and now I’ve finally implemented it. As the title suggests, it will be a simulation of raindrops falling onto a water surface, including the typical expanding ripple circles. www.youtube.com/watch?v=0IOI...

Godot 4: Raindrop ripple shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 04/05/2026

Hi everyone! Let’s create a shader that looks like a simple radar, which can be useful for many types of games. It will be entirely generated using lines and other primitive shapes, and we’ll add some animation to it as well. www.youtube.com/watch?v=0O6P...

Godot 4: Radar shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 27/04/2026

Hi everyone! I think it’s time for another post-processing effect that we can apply to the entire screen or a selected element. This time, we’ll recreate the look of an old photograph that has yellowed over time and developed other signs of wear. www.youtube.com/watch?v=sC1C...

Godot 4: Old photo shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 20/04/2026

Hello, everyone! In this video, I will create a simple shader for generating an animated star using a noise texture. And as usual, we will have plenty of parameters available to customize this effect to suit the needs of our game. www.youtube.com/watch?v=F-7Q...

Godot 4: Noise star shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 13/04/2026

Hello, everyone! Let’s create a simple effect that resembles a waterfall with several layers of animated water. Something like this can be useful in many 2D games, and it won’t be too computationally demanding. www.youtube.com/watch?v=i5NP...

Godot 4: Waterfall shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 06/04/2026

Hi everyone! Let’s program a simple effect that simulates looking at a scene through ribbed glass, also known as fluted glass. It’s a straightforward algorithm based on a combination of a few basic principles. www.youtube.com/watch?v=1dNx...

Godot 4: Fluted glass shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 30/03/2026

Let’s program this interesting effect, which allows us to successfully simulate the view through a glass window during heavy rain. The shader we create this way will have many parameters and customization options, so it can be used in a wide range of situations. www.youtube.com/watch?v=dabR...

Godot 4: Heavy rain window shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 23/03/2026

Hi, everyone! It’s time to create something small in 2D again, and since simulating old devices can be very useful in games, we’ll take a look at a shader that mimics the behavior of a low-quality analog screen. www.youtube.com/watch?v=_2UF...

Godot 4: Another broken TV (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 16/03/2026

Hello, everyone! In this video, I will demonstrate how we can cut any 3D object into irregular fragments and then use them to simulate an explosion, for example, in a space shooter. We will start in Blender and complete the whole effect in Godot. www.youtube.com/watch?v=NoJR...

Godot 4: 3D Explosion (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 09/03/2026

Hello, everyone! In the previous tutorial, we programmed a 3D spatial shader, and this time we will stick to the same concept. In this video, I’ll demonstrate how to create a simple outline or glow effect for any 3D object in Godot 4. www.youtube.com/watch?v=vKLD...

Godot 4: Glow/Outline Shader in 3D (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 23/02/2026

Hi everyone! We’ve already created several 2D fire effects here and even one or two 3D ones. This time we’ll return to two dimensions and show how to make a slightly different kind of fire using a few layers and a somewhat different technique. www.youtube.com/watch?v=gmyr...

Godot 4: Wildfire shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 09/02/2026

Hi everyone! We have another effect on the agenda whose code fits on a single line. This time it will be a simple edge detection, which we can also use as an original way to fade out a scene, for example, after finishing a level in our game. www.youtube.com/watch?v=dp6M...

Godot 4: One line edge shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 02/02/2026

Hi everyone! We’ve already covered several shaders that simulate fog, but they were mostly side effects of technologies that aren’t primarily designed for fog. This time, we’ll create a true fog shader and ook at what options Godot 4 offers for this type of effect. www.youtube.com/watch?v=U9Uu...

Godot 4: Volumetric fog shader, part 1 (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 26/01/2026

Hello, everyone! This is a continuation of the previous tutorial, in which we created a simple dithering effect. And as I promised, this time we’ll finish the topic by programming a shader for classic dithering with a regular structure. www.youtube.com/watch?v=Mcv0...

Godot 4: Classic dithering shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 19/01/2026

Hi everyone! Let’s continue programming shaders whose code fits on a single line. This time, we’ll create an effect called dithering, which in this case means rendering an image using a heavily limited color palette. www.youtube.com/watch?v=1qS0...

Godot 4: Simple dithering shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 12/01/2026

Hello, everyone! The effect I’ll be creating in this video falls into the category of image distortion—that is, a simulation of an imperfect display or external interference. So, let’s take a look at how this algorithm works. www.youtube.com/watch?v=q94s...

Godot 4: Frequency distortion shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 05/01/2026

Hi everyone! This is the first video I’ve published in 2026, and since I wouldn’t like to start the new year with something extremely complicated, this tutorial will be easy and quick. We’ll show how we can simulate a view through something like small glass blocks. www.youtube.com/watch?v=0f0K...

Godot 4: Glass block shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 29/12/2025

Hi everyone! There are only a few days left until the end of 2025, so I’ll release one more video tutorial this year. Once again, it will be a contribution to the category of scene transitions. And I would say that the rotating vertical tiles look quite impressive. www.youtube.com/watch?v=bLEk...

Godot 4: Wave transition shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 22/12/2025

Hi everyone! We’re almost at the end of the year - at least at the time of recording this video—which means we still have time for one more broken-screen effect. This time, it will be a simulation of an LCD monitor that has suffered some sort of internal malfunction. www.youtube.com/watch?v=RTwP...

Godot 4: Digital glitch shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 15/12/2025

Hi everyone! This time we’ll once again take a short break from creating shaders. Instead I’ll describe how we can test a game developed in the Godot Engine on the Steam Deck and what needs to be ensured or verified before we release our game for this console as well. www.youtube.com/watch?v=VnOL...

Godot and Steam Deck (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 08/12/2025

Hi everyone! Didn’t I say recently that you can never have too many scene-transition effects? I’ve just created another one that can also be customized in interesting ways, so it’s basically three effects in one. Let’s take a look at how such a shader works. www.youtube.com/watch?v=5CME...

Godot 4: Dot transition shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 01/12/2025

Hello everyone! This time we’ll create a shader that simulates playback from a faulty videotape. Yes, it’s a simulation of an outdated technology that’s almost unknown today, but I still think it’s an interesting effect that can find its place in many games. www.youtube.com/watch?v=_2nG...

Godot 4: VHS noise shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 24/11/2025

Hi everyone! This time, we’ll make another transition effect, and as you can see, it simulates something like a pixelated change of the background image. Let’s take a look at how easily we can program a similar effect. www.youtube.com/watch?v=D_zZ...

Godot 4: Noise transition shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 17/11/2025

Hello, everybody! In this video, I’ll demonstrate how we can program a shader that simulates a page turning in a book, which is definitely a very effective way to transition between scenes. So let’s launch the Godot editor and get started. www.youtube.com/watch?v=8aIK...

Godot 4: Page flip shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 10/11/2025

Hi everyone! Let’s take a short break from post-processing effects. In this tutorial, I’ll be creating a dynamic ornament that at one stage resembles a magical portal and at another something like a fiery eye. www.youtube.com/watch?v=yRA3...

Godot 4: Fiery ornament shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 03/11/2025

Hi everyone! Let's create another post-processing effect. The result can be quite useful—for example, if we want to simulate TV signal interference in our game and control the visual appearance of that effect with parameters. So, let's do it. www.youtube.com/watch?v=LJ7r...

Godot 4: Horizontal jitter shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 27/10/2025

Hi everyone! Last time, I talked about post-processing effects and how it’s useful to have as many of them available as possible. And here we are again, because in this video we’ll be making something new in this category. www.youtube.com/watch?v=6JEG...

Godot 4: Underwater shader (tutorial)

YouTube video by FencerDevLog

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Filip Rachůnek @rachunek.com · 20/10/2025

Hi everyone! I was thinking that we can never have too many effects for transitions between game screens, so I made a fairly simple one that lets us demonstrate a nice result with an easy formula. Let’s take a look at how easily we can create this. www.youtube.com/watch?v=yl32...

Godot 4: Stripe transition shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 13/10/2025

Hey everyone! It looks like our collection of shader-generated tunnels has grown once again. This time, as you can see, it’s an interesting effect created purely with points, which we can further adjust as needed. So let’s get to programming it. www.youtube.com/watch?v=NSCX...

Godot 4: Point tunnel shader (tutorial)

YouTube video by FencerDevLog

Filip Rachůnek @rachunek.com · 06/10/2025

Hi everyone! I’d say it’s time for another simple shader. I don’t think we’ve created an infinite zoom here yet, especially if it’s a cool-looking effect that we might be able to use in a game - and if not, it’s still fun to watch. So let’s get to it. www.youtube.com/watch?v=En9L...

Godot 4: Endless ornament shader (tutorial)

YouTube video by FencerDevLog