Filip Rachůnek

YouTube video by FencerDevLog Godot 4: Wildfire shader (tutorial)

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...

1.1.2 (2026-02-10): Added fractal_flower (scene and shader). Added wildfire (scene and shader).

YouTube video by FencerDevLog Godot 4: One line edge shader (tutorial)

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...

1.1.1 (2026-02-06): Added simple_edge (scene and shader).

YouTube video by FencerDevLog Godot 4: Volumetric fog shader, part 1 (tutorial)

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...

1.1 (2026-01-27): Updated to Godot 4.6. Added volumetric_fog (scene, shader and script).

YouTube video by FencerDevLog Godot 4: Classic dithering shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Simple dithering shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Frequency distortion shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Glass block shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Wave transition shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Digital glitch shader (tutorial)

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...

YouTube video by FencerDevLog Godot and Steam Deck (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Dot transition shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: VHS noise shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Noise transition shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Page flip shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Fiery ornament shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Horizontal jitter shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Underwater shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Stripe transition shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Point tunnel shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Endless ornament shader (tutorial)

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...

YouTube video by FencerDevLog Godot 4: Steam API tutorial

If you’re planning to release your game on Steam, this functionality will be very useful, as it allows you, for example, to save game progress to Steam Cloud or enable various achievements. So, let’s take a look at how we can achieve this in Godot 4.
www.youtube.com/watch?v=Suye...

YouTube video by FencerDevLog Godot 4: Dynamic talent tree (tutorial)

Hi everyone! And as I promised in the previous video, today’s one will be somewhat related to the new game release, because I’ll show how I created the system for displaying and using a talent tree in that game. So let’s dive into the UI design and programming.
www.youtube.com/watch?v=A35l...

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YouTube video by FencerDevLog Godot 4: Circular blur shader (tutorial)

Hey everyone! I’ve just finished writing my book about game development in Godot, which means the time I had for coming up with new shaders was once again equal to zero. But I do have something after all. Let’s take a look at how we can create yet another blur effect.
www.youtube.com/watch?v=H_ys...

0.9.7 (2025-09-13): Added flow_noise (scene and shader), and circular_bur (scene and shader).

YouTube video by FencerDevLog Godot 4: Flow noise blur shader (tutorial)

Hi everyone! Let’s create another shader in Godot Engine. I was thinking about how we could combine the organized chaos represented by fractal Brownian motion with image post-processing.
www.youtube.com/watch?v=mN9q...

YouTube video by FencerDevLog Godot 4: 2D shader in 3D scene (tutorial)

Hi everyone! This time I’d like to show how a 2D shader can be used in a 3D scene, which can have plenty of applications in 3D games.
www.youtube.com/watch?v=z2vU...