Questions tagged [fragment-shader]
A program that runs on the GPU to determine output colors for pixels. Also known as a fragment shader.
320
questions
0
votes
0
answers
112
views
Creating a fake point light with empty object in the Unity shadergraph
I'm trying to create a fake point light from an Empty object with the shadergraph. This is a Blender prototype of the effect i'm trying to create.
In Unity I do get the light mask to work somewhat as ...
- 1
1
vote
1
answer
111
views
How can I dynamically change the skin and blush colours of an animated sprite's face in Unity?
I want to achieve this effect in unity when processing my sprites
before
After
I was thinking that I could use two color pickers to tell a shader only to create a gradient if two colors share a ...
- 11
4
votes
2
answers
191
views
How would I mask the player node out of a canvas shader?
I'm making a 3D game, and I want to create a post processing effect using a canvasitem and a colorrect, that effects everything on screen apart from the player. I already have the shader itself made, ...
- 141
0
votes
0
answers
29
views
How to blend local cubemaps?
I have a (GPU) Buffer that contains the World Position and Extents of Local Cubemaps aswell as a TextureArray that contains the textures of the Cubemaps.
The Bounds of the Local Cubemaps are Axis ...
- 703
0
votes
1
answer
104
views
How to apply sampler2Darray textures to different locations of a single mesh?
In openGL, I have a 3D terrain composed of a grid of 255x255 vertices. The vertex of the lower left corner is at coordinates (-127;-127) and the one of the upper right corner is at coordinates (127;...
- 103
0
votes
1
answer
72
views
Which pixels does the fragment shader of an unlit shader, applied on an object, affect in Unity?
Let's say that I have a cube that has an unlit shader applied to it. The shader does basic ray-marching.
...
- 17
1
vote
0
answers
198
views
Expected a smoothly fading opacity in this Raylib shader, but instead it is chunky
In my main file, I create a regular icosahedron and assign the below shaders to it using the Raylib framework in C++17. I intended for the vertex shader to assign a 1.0 alpha value to points at Z=-5....
- 11
0
votes
0
answers
60
views
How to remove pink pixels from weather radar pngs downloaded at runtime?
I have some radar imagery that comes from a source that has a bug in it's rendering system. Pink is supposed to be the separation of specific cloud consistencies BUT it often shows up on the edges of ...
- 229
0
votes
1
answer
50
views
How do I distort a 2D texture based on the movement of a point that starts at the center?
So there's this point that starts in the center. If the user drags it up towards the top of the texture, the top squishes and the bottom stretches. If the user drags it down, the top stretches on the ...
- 11
1
vote
0
answers
665
views
Pixel-effect cube in Godot 4
I'm trying to make a simple scene where the camera is in orthogonal mode with isometric settings just like if it was an isometric 2D game. That's because I have already tried doing it with 2D only but ...
- 111
0
votes
0
answers
106
views
OpenGL rendering a specific color attachment to the screen
Current fragment shader:
layout(location=0) out vec4 output_0;
layout(location=1) out vec4 output_1;
Here I want to render the output_1 to the screen instead of ...
- 101
0
votes
1
answer
423
views
Why do my game objects become invisible as soon as I attach the material to which this shader script is applied?
I wrote a shader script that is an extension of the Sprite-Lit shader in previous Unity versions' standard assets in an attempt to feather the edges of a sprite using additive blending. Here is the ...
- 41
1
vote
0
answers
141
views
Is there an alternative method do do per-texel lighting in 3D without stream compaction?
Note: I'm not asking for an x% faster method. Work efficiency is an objective measure, it doesn't change because of hardware.
I've got a voxel world I'm trying to render, think Minecraft, same texture ...
- 1,713
0
votes
0
answers
42
views
Resample image of sphere to match appearance of rotation
I am rendering sphere to a texture. Now, I have screen space texture, and I need to offset this texture based on screen space movement (dx, dy) and render it to a new texture.
For example, the left is ...
- 1,106
0
votes
1
answer
123
views
Is it possible to draw billboards from point data held in a compute buffer?
I'm currently trying to show a galaxy and have developed a compute shader that places/moves "stars".
Another vertex/fragment shader reads the buffer and currently places a point at each ...
- 1,166
0
votes
0
answers
86
views
custom 8Bits RGBA textures YCoCg encoding decoding with 16 bits Y packing not working correctly
Context: I invented a way to get ugly GI for low end platform (target being Mali 400 mp GPU) through texture feedback and texture PVS.
Problem: In order to bypass the precision limit of 8bits textures,...
- 327
13
votes
1
answer
3k
views
How to do color post processing in WebGL, when you can not read the color of the current pixel?
In a WebGL 2 GLSL fragment shader, one can not access the pre-existing color value of the current pixel, i.e. the color that is already there in the framebuffer before the pixel that is currently ...
- 243
0
votes
1
answer
220
views
How to pass voxel data to shader?
I am working on a voxel game, and I approached the point where I need to add day/night in my world. Apparently, I should just be able to pass the torch and sunlight values into my shader and multiply ...
- 101
0
votes
0
answers
98
views
Draw a plane in fragment shader using determinant?
I'd like to use the determinant of a matrix to draw a plane in the fragment shader. But I don't understand how to come up with the matrix.
Let's say that I have 3 points that lie on the plane: A, B, ...
- 101
1
vote
2
answers
572
views
Combining palette-swaps and smooth scaling in a pixel-art shader
I am creating a pixel-art game in MonoGame, and have written a shader to perform various effects on a sprite when rendering it, such as performing palette swaps, highlighting outlines, etc.. Most of ...
- 23
1
vote
2
answers
607
views
Custom directional shadow map from sun
Due to some material features, I need to create my own directional shadow map.
Everything seems to work ok, until the moment where I compare depths.
First I add a camera component to the directional ...
- 173
1
vote
1
answer
122
views
Unity Shader w Color Bar for Fragment Color Manipulation
Situation
I have a shader for images with "wonky" colors - the reason the colors are so messy is because it's a sneaky way to encode data into the RGB color channels eg the red channel is ...
- 229
1
vote
0
answers
494
views
1Bit Bayer Ordered Dithering Shader
I’m having a problem trying to fix my 1bit ordered dithering shader.
This shader is going to be perfect to be used but there is some detail that I would like to fix.
First of all, this shader is not ...
- 41
0
votes
0
answers
326
views
Very basic question: Passing data in fragment shader to next frame (Metal)
I am casually trying to learn a bit about writing simple fragment shaders, in particular using Metal API. I have been experimenting in KodeLife. As a simple example, I am trying to remake the Double ...
- 101
1
vote
0
answers
300
views
Cursor trail with fragment shader
I wish to draw a simple mouse trail using fragment shaders, similar in appearance to drawing the following in processing (omitting the step of clearing the canvas). I cannot wrap my head around the ...
- 111
0
votes
2
answers
373
views
Is there a way to figure out in which quad I am in fragment shader?
In my openGL project I draw a lot of quads (composed from 2 triangles) - for sake of example let's say quad 0,1,2 and 3. I process them in single pass. I do transform them with projection view matrix ...
- 486
0
votes
0
answers
220
views
OpenGL I want my image to change color based on stencil
I have an image and a rectangle on the screen, using the using this stencil functions I managed to render or not render a certain part of my image.
...
- 1
0
votes
1
answer
76
views
Relocate texture regions with pixel shader
I'm new to DirectX and pixel shader development. I want to know how to relocate region of input image in post processing.
What I want to achieve is to divide my image into 4 pieces and then relocate ...
0
votes
1
answer
522
views
Shade a box different colors for two ends with one material in Three.js
First, I knew the following basic knowledges,
GLSL Language, Learn WebGL2 - GLSL
* GLSL Shaders
OpenGL - Coordinate Systems, [OpenGL - Advanced GLSL]
3D Game Shaders For Beginners - GLSL
...
- 121
0
votes
1
answer
409
views
Debugging shader script in GLSL ES - Game Maker 2 (CompileError)
I am trying to use this shader in the game I am making with Game Maker Studio 2.
I tried to convert it for GM2 and here is my result:
Shader type I used on GM2 is ...
- 111
1
vote
0
answers
210
views
Why is this GL_TRIANGLE fan texturing incorrectly?
I am constructing some terrain for a 3D game (in C) as a 2D grid of tiles, the corners of which have height into the 3rd dimension. In the middle of each tile is another vertex, the height of which is ...
- 111
0
votes
1
answer
57
views
filter camera output by mesh
(skip to edit for the actual problem)
I have a simple plane mesh generated via script (has arbitrary shape).
I want the shader to discard (set to black) all pixels that aren't passing through that ...
- 1
-1
votes
1
answer
238
views
Shaders overriding other shaders
Recently, I've been making a 3D game and I have been having trouble with making multiple shaders. I've researched this for a bit, and told that I had to use ...
- 19
0
votes
0
answers
66
views
Issues with percentage closer filtering
I'm trying to code a simple game via OpenGL C++.
I've implemented a point light, parallax effect with textures, objects from blender etc. but I seem to have an issue with my percentage closer ...
-1
votes
1
answer
114
views
Post Processing without using FBOs?
Recently, I've been making a 3D game (hint my questions), and I recently have modified a pixelization shader from a unity shader graph tutorial. The thing is, I want to render the shader on the WHOLE ...
- 19
0
votes
2
answers
274
views
How to use vertex and fragment shaders without using VBOs and VAOs?
Recently, I am trying to make a 3D game in LWJGL 2, not LWJGL 3, just because I am more familiar with LWJGL 2. Since LWJGL decided to shut down their legacy wiki website, I've been researching alot ...
- 19
1
vote
0
answers
958
views
OpenGL Compute Shader vs Fragment Shader device support
I have a game with massively parallelizable logic, which I intend to write calculate on the GPU (Java/LibGDX).
I am planning to implement a logic for it through a fragment shader, instead of a compute ...
- 113
1
vote
0
answers
275
views
Fragment shader not working as expected
I am porting the following shader into Godot. The results seem not correct though. Apart from the wrong colours there seems to be no change with time. What is the problem with it?
...
- 111
1
vote
2
answers
822
views
How to colour blend between two materials? [closed]
I've been trying to get a material (with an image texture) to animate towards a colour mix with transparency, but either I'm attempting something the wrong way, or unable to find the right keyword to ...
1
vote
1
answer
365
views
How to avoid banding with raymarched fog?
I have a raymarching shader for fog.
It works well but It creates artifacts in the form of banding:
I understand the problem: The step size is too large and the sample points above the ground are not ...
- 703
1
vote
1
answer
356
views
Why does my stencil buffer allow pixels through?
I'm rendering a scene using OpenGL. The scene consists of a grassy environment and a small lake (visible as two surfaces). To achieve water surface transparency, I'm using a stencil buffer to render ...
- 559
1
vote
1
answer
2k
views
How to convert screen space to world space?
I have a shader that should do raymarching.
But I have problems converting the fragment's position to a worldspace coordinate.
This is my vertex shader:
...
- 703
1
vote
1
answer
3k
views
mapping texture uvs to sphere for skybox
I've been trying to learn shader coding, specifically procedural skyboxes. I've been using this guide here which is a shader graph tutorial and try to write out the steps in code. However, I'm stuck ...
- 53
3
votes
1
answer
230
views
Shading a concave cube as a convex cube with forced perspective
Context
I'm building a graphics pipeline for voxel volumes. I'm using an existing game engine (Bevy) which provides a way to put an object in 3D space. In my application, the voxel volumes can be ...
- 33
0
votes
1
answer
552
views
Drawing a pixel perfrect rectangle with stroke using shader
I'm drawing a rectangle based on input sizes and use it to mask the screen.
Now I want to give it 1 pixel stroke but it doesn't rasterize to one pixel.
I tried UnityPixelSnap but still no chance.
Here'...
0
votes
0
answers
38
views
How to 3 triangle could generate hundred of fragments? [duplicate]
I am just watching the Shaders intro video from here where the Youtube is saying
3 vertices make up a triangle and Could generate a couple hundred fragments based on how much of the screen that ...
- 1,970
2
votes
1
answer
846
views
Is linear filtering possible on depth textures in OpenGL?
I'm working on shadow maps in OpenGL (using C#).
First, I've created a framebuffer and attached a depth texture as follows:
...
- 559
1
vote
0
answers
2k
views
Unity: Efficient way to get the average pixel color for a portion of the camera viewport
At it's core, the problem I'm trying to solve is this:
I have a camera (not main) that I would like to project to a 2 pixel RenderTexture. I would like the first ...
- 111
5
votes
1
answer
4k
views
Creating Blender-like cavity shader
I'm trying to achieve in Godot something similar to cavity effect from Blender (this can be enabled in viewport options; cube on the left is displayed by viewport with this option enabled):
How would ...
1
vote
1
answer
242
views
Sending light data from Vertex Shader to Pixel Shader?
We have a pixel shader constant buffer that contains the light data for the item that is currently rendered.
To implement tangent space normal mapping, i would need to transform each light into ...
- 703