Questions tagged [artifacts]
The artifacts tag has no usage guidance.
28
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HealPix: Different results when comparing C++ and Vulkan
I have converted the algorithm for calculating the HealPix value from Lat/Lon values from C++ to GLSL. The result is saved in a BMP image and looks correct. Both algorithms (C++ and GLSL) use the same ...
- 1,299
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How to achieve smooth max of two coordinates in a shader
I am trying to achieve a border effect to a square tile on a xz plane. I am using max of coordinates x and z to achieve that. Here is my ShaderLab code:
...
- 3
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AMD GPU specific triangles disappearing by subsequent draw calls in same frame
we have a Windows/DirectX11 2D Renderer that paints textured triangles to the screen from back to front. There is no face-culling or depth test activated.
Now on AMD GPUs it happens randomly that an ...
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How to avoid curvature artifact in raytracer?
I have a pretty simple raytracer that is rendering some SDFs, but when my camera is close to the object I see curves:
I am not entirely sure where they are coming from, as I am using nothing but ...
- 1,736
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How widespread are T-vertex artifacts nowadays?
As far as I know, OpenGL specifies that you cannot rely on precise rounding of vertex and edge coordinates for rasterization - which means that T-vertices may cause small artifacts: a continuous and a ...
- 121
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ray racing (Whitted) bad shadow on far objects (artifact)
situation:
I've implemented a Whitted style ray tracing in C. Everything appear to works except the shadow cast by small object on big far objects
The problem :
red sphere have radius 0.5
orange ...
- 31
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108
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What can be the cause of some strange ray shadows artefacts on a perfectly flat surface?
First of all I have to say that I am really new in the world of Computer Graphics. I apologise if some of my questions may appear trivial.
I am currently using a non-commercial ray tracing and ...
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Reducing artificial rings in mean curvature of mesh
I have an isosurface/mesh (generated via marching cubes) of a micro-CT scan. Originally the surface looks very noisy, which becomes prevalent when the mean curvature is visualized:
To reduce the ...
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659
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Visual Artifact in Wireframe Grid/Plane
I have a simplistic shader program that adds reference coordinate planes to a scene.
These planes are drawn as intersecting lines.
When viewed at a distance, a visual artifact is created; there is ...
user13167
2
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1
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476
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Strange sphere reflection effects in ray tracing project. I cannot figure out what causes them
I started a ray tracing project in Python. I made a CUDA kernel and a trace() function for each pixel. It works perfectly when calculating intersections, shadows and lambert shading, however when I ...
- 71
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Microfacet BRDF artifacts
I've been trying to implement a microfacet specular BRDF based on the equations in Real Shading in UE4, but I'm getting weird ring-shaped artifacts in the highlights of rough surfaces:
Here's the ...
- 198
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516
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Ghosting in volumetric lighting
Does anyone know any method to remove ghosting in volumetric lighting?
When light move it leaves trail behind, i would like to remove it.
Volumetrics are Bart Wronski style (in frustum) with ...
- 596
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419
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Normal Artifacts On Grazing Angles
I am currently experiencing a very obvious artifact that occurs when looking at objects on very grazing angles
Here is a picture of the artifact:
I noticed that the issue was coming from my ...
- 51
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How to solve Z buffer artifacts
I am currently rendering a scene in the most standard fashion possible (triangle projection and Blinn-Phong for shading)
However I am getting some artifacts:
As you can see the lion head is not ...
- 1,736
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What remedies are there for percieved color artifacts due to pixel geometry?
I have a white line on black background. Because of the pixel geometry the line does not look really white; one edge looks red-isch, the other blue-isch. Other fore- and background yield other ...
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