a computer program that runs on graphics hardware and provides a high degree of control over how scenes are rendered

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9
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0answers
347 views

Ogre PSSM Grass Receiving Shadows

So I made the switch to Ogre3D (v1.7) and using PagedGeometry. What I'm trying to do is make a simple scene with a terrain, some trees and grasses. In a nutshell, I would like to achieve this kind of ...
3
votes
0answers
20 views

How can non-CG shader code in Unity be included?

In Unity shaders, #include, #define, and other preprocessor commands seem to not be able to be used outside the CGPROGRAM section of the shader. Since these are required for compiling multiple shader ...
3
votes
0answers
59 views

Draw Edges in OpenGL

I use blender game engine, and blender use openGL for graphics. How can I draw lines around all 3D objects? Would this be a job for a filter? Mainly, I want my end result to look drawn. I found this: ...
3
votes
0answers
97 views

Unity - reconstruct position from depth

I am using Unity and I want to reconstruct position from depth and frustum corners in pixel shader. I am doing this: In my App, I calculate view-space corners of the far frustum plane and pass them ...
3
votes
0answers
53 views

Unity 5 - custom lighting model

I have tried to use my own lighting model in surface shader in Unity. But there is a problem. If I init my own lighting via #pragma surface surf _SimpleSpecular Lighting_SimpleSpecular method is ...
3
votes
0answers
67 views

How to draw Shadow Volumes in one draw call?

I've got a simple app that draws 3D cubes using instance rendering and I'm implementing Shadow Volume. Each cube's vertex, uv, normal and index data are statically stored in 4 vertex array buffers. On ...
3
votes
0answers
87 views

Raymarching tangents

I've recently started to experiment with raymarching over on shadertoy.com. It seems common to find the normal for a distance field like so: vec3 scene_normal(vec3 p) { vec3 e = vec3(0.001, 0.0, ...
3
votes
0answers
406 views

Ashikhmin-Shirley model implementation: ugly result

I am trying to implement the Ashikhmin-Shirley model using these formulas: This is the GLSL 1.2 fragment shader code: uniform vec4 materialAmbient, materialDiffuse, materialSpecular; uniform ...
2
votes
0answers
76 views

Jagged light bleeding where surface is roughly parallel to shadow mapping light direction

I am using Unity but this question might not be proper to this engine. I have projected the shadow map onto this sphere but there are grazing shadows. Is it possible to avoid it or to correct it as I ...
2
votes
0answers
82 views

Ways to get around the limiting default terrain shaders in Unity

I am trying to use the Toon Rim Light shader for Unity however there are a few problems when trying to use any custom shaders for a terrain in Unity. The most well known is of course, that all ...
2
votes
0answers
52 views

Phaser: Shader Chain

I want to implement lighting via shadowmaps. I see process as: 1) render something to RenderTexture1(size as game) 2) create RenderTexture2 (custom size) 3) add it to Image2 (custom size) 4) apply ...
2
votes
0answers
134 views

How do I make volumetric grass?

I've been extremely interested in volumetric technology, especially for grass. Online resources are extremely scarce on this topic. What is the difference from creating a lot of mesh billboards? ...
2
votes
0answers
130 views

OpenGL: Avoid geometry shader for cubemap framebuffer

I want to render an environment map into a cubemap framebuffer but I dislike the fact, that I have to use the geometry shader to set gl_Layer because the geometry shader would be a basic passthrough ...
2
votes
0answers
554 views

How can I combine my scrolling effect with the vertex lit shader?

I want my shader to work in both Forward and VertexLit rendering modes. I'd written a texture scrolling shader, but I also want to consider lighting which is produced by Vertex lit shader. I can't add ...
2
votes
0answers
92 views

Framebuffer Heightmap Performance Problems

I am using a framebuffer to procedurally create heightmaps with perlin noise in GLSL shaders. There are two main problems that I am experiencing with this. I have a quadtree for the terrain and in the ...
2
votes
0answers
418 views

Monogame working with Krypton

I am trying to make a simple 2D game engine using Monogame and the Krypton 2.0 lighting engine. So far I have succeeded in rendering a light but I am unable to generate any shadows from any hull's. ...
2
votes
0answers
521 views

XNA 4.0 Pixel Shader 3.0 Exact Texture Lookup/Sample Issue

I am stuck on trying to solve this problem. I originally had some shaders written that worked for XNA 3.1, but after converting to XNA 4.0 they would no longer compile due to instruction counts, flow ...
2
votes
0answers
328 views

iPhone GLSL shader dynamic branching issue

I am trying to pass an array of vec3 as uniform and then iterate through them on each pixel. The size of array varies on situations so I can't make the loop with constant number of iterations. ...
2
votes
0answers
315 views

Kinect User Silhouette Shader

I have this usermap from kinect's depth data (size is 320x280) and i want to display it on my game. The problem, of course it's ugly (first image) and i want to have beautiful effect like in the ...
2
votes
0answers
380 views

Normal maps in 3dsMax - OgreMax - how to view associated tangent vectors?

Reading this post I found out that 3dsMax might not use the same tangents when rendering normal mapped objects. In my case, I was using Ogre and OgreMax to analyze results and they were very ...
1
vote
0answers
57 views

Cell Based Simulation

I'm working on a cell based simulation in a pixel shader (webgl, shadertoy.com specifically), but am having some challenges trying to make the simulation consistent. Each cell (pixel) has the ...
1
vote
0answers
45 views

Subsurface Scattering - Transmittance

I have a question related to SSS and especially transmittance. I've looked at several papers about that topic, most of them from Jorge Jimenez, which are very interesting and, I admit, a bit hard for ...
1
vote
0answers
50 views

Point Light shows black box & rect (PointLight not working) - libgdx 3D

I am creating a 3d scene currently a box and rect, and trying to enable lighting. When i create a PointLight and add it to Environment everything turns to black color? all i want to do is ...
1
vote
0answers
39 views

How to create offsetting lines that draw across the screen in Monogame?

I'm trying to create an effect on the screen like the gif below. Basically lines that are offset by 1 pixel draw across the screen from either side which then eventually creates a solid color. I'm ...
1
vote
0answers
41 views

Consistent Shadow Map Filtering

I want to filter my shadow map generated by PSSM, but the problem is that I have a inconsistent filter size. The problem is that the shadow map sources rotate to find the best fit for the camera ...
1
vote
0answers
44 views

glTextImage2D with GL_UNSIGNED_BYTE giving weird results while with GL_FLOAT just works, driver bug?

Update: OK, not being able to see the textures loaded by FreeImage was just one of the common mistakes when using modern OpenGL. My texture loading code did not set GL_TEXTURE_WRAP_S/T and ...
1
vote
0answers
24 views

DirectX 9 Light projection

I am trying to see changes of component 'z' from light space. In vertex shader component 'z' divide 'w' is not 0. But after sending float4 with texcoord1 to pixel shader its 0. All matrices are good. ...
1
vote
0answers
137 views

Water drops on camera

How can I create water drops on camera something like we see in Ripitude GP, I tried using Unity's default GlassStainedBumpDistort shader though its performance heavy on mobile plus it do not let ...
1
vote
0answers
54 views

Using depth values for fake ambient occlusion

I'm using the normalized distance to the camera to get depth information in the fragment shader. When using this value as fragment color, it looks at lot like ambient occlusion (of course only in the ...
1
vote
0answers
81 views

Rotating, moving and scaling a mask in a shader

I want to rotate, move or scale a mask in a shader. But I have no clue to how perform these actions. My code: @Override public void create() { batch = new SpriteBatch(); background = new ...
1
vote
0answers
54 views

Set Render Target usage

I am using Unity and I have some difficulties about understanding the way Set Render Target works and how it can behave with the shaders. Is it possible to render a shader pass in multiple render ...
1
vote
0answers
17 views

Is there a way to control the ordering and grouping of ShaderLab Blend command?

I'm writing a shader in Unity that responds to 3 lights: 1 directional and 2 point lights. The point lights are processed in the ForwardAdd pass (once per light). I need the ForwardAdd pass to blend ...
1
vote
0answers
423 views

Creating lightning effect with glow effect

I am trying to recreate Drilian's lightning bolt in unity and I have faced a problem in the "Adding Some Glow" part. I am missing glow effect (and/ or "rounded beams"). Here is what I am doing: I ...
1
vote
0answers
42 views

Texture shader using model's texture

I'm trying to get a model rendered in monogame using a texture shader. I'm using the code from this tutorial project: http://kgiannakakis.github.io/MonoGameEffects/ I created a simple textured cube ...
1
vote
0answers
96 views

Why would an ambient occlusion (AO) shader's performance be dependent on light direction?

One of my favourite games recently implemented ambient occlusion as a graphics feature, which appears to perform very well in most circumstances - except during sunrise and sunset. As someone who is ...
1
vote
0answers
205 views

why is my (from example) shader appearing as black?

I have the following (very simple) shader: #pragma kernel CSMain RWTexture2D<float4> Result; [numthreads(8,8,1)] void CSMain (uint3 id : SV_DispatchThreadID) { Result[id.xy] = ...
1
vote
0answers
182 views

Multi-layered tilemap

I need to be able to efficiently render a tilemap which can be constructed this way: There is one non-transparent base layer Then there can be 3 partially-transparent layers on top of it. Each tile ...
1
vote
0answers
127 views

Sprite outline based on light position in UE4

I have simple sprite (for example black box) and I like to add to it outline (red line on example image) but based on light direction. I know UE4 use deffered renderer, so I cant access to lights, but ...
1
vote
0answers
119 views

Glow shader limited by the texture area

I'm working on a glow shader (for 2D engine Futile relying on Unity). It works OK but the effect is limited by the texture area. Except from adding a lot of empty pixels around the textures (which ...
1
vote
0answers
72 views

Generate a large data structure using a compute shader

I know that RWTexture2D Result; void CSMain (uint3 id : SV_DispatchThreadID) { Result[id.xy] = float3(1,2,3); } will result in an texture containing the numbers 1,2,3 however I'm ...
1
vote
0answers
35 views

postprocessing shader destroying viewport on linux?

Basically I implemented gamma correction into a q3 based game to get rid of the annoying SetDeviceGammaRamp. On windows and macosx everything works fine, but on linux it draws garbage. It looks like ...
1
vote
0answers
67 views

SpriteBatch passing textures to GPU

How exactly (or, how often) are textures passed to the GPU shaders in MonoGame/XNA? I am asking because I was profiling a MonoGame/XNA application and noticed that the memory controller load (using ...
1
vote
0answers
202 views

Understanding diffuse lighting in The Division

Here is a screenshot of the main character walking under a bright lamp: His hat, that was originaly dark grey, turns completely white. My question is how can such lightsource do this without making ...
1
vote
0answers
96 views

Sprite framework binding multiple textures

In an attempt to batch render as many quads (sprites) as possible, I'm instance rendering a single unit-sized quad and passing in a buffer of per-instance data that includes width/height, texture ...
1
vote
0answers
187 views

OpenGL Bump Map — Texture artifacts ?

I am learning OpenGL (and learning the math behind it) and I'm making a simple OBJ viewer, nothing fancy. I have diffuse, specular and ambient light/texture working fine and now I am implementing the ...
1
vote
0answers
273 views

Unity Free Inverse Depth Mask?

How would it be possible to create an inverse depth mask? In this case, I refer to a depth mask as a shader attached to a mesh that 'pokes a hole' through the current camera layer to let you see the ...
1
vote
0answers
578 views

How to implement efficient Fog of War?

I've asked a question how to implement Fog Of War(FOW) with shaders. Well I've got this working. I use the vertex color to identify the alpha of a single vertex. I guess the most of you know what the ...
1
vote
0answers
73 views

Multi Pass Blend

I am seeking the simplest working example of a two pass HLSL pixel shader. It can do anything really, but the main idea is to perform "ping ponging" to take the output of the first pass and then send ...
1
vote
0answers
116 views

Compute min/max position of tile in compute shader

I'm trying to implement tiled deferred lighting with OpenGL compute shaders. For that, I need to compute the minimum and maximum position of each tile. My first approach was to use atomicCounters ...
1
vote
0answers
158 views

SpotLight in ForwardBase pass using forward rendering

Is there anyway I can force Unity to allow me using a custom shader to render spotlights in a ForwardBase pass (using Forward Rendering Path)? For what I could see since now: Unity use and ...