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Questions tagged [distortion]

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2 votes
0 answers
28 views

How does this wormhole effect shader create a distortion?

Below is the code for a simple wormhole effect shader made in shadertoy.com. I understand everything else except: ...
kyopa's user avatar
  • 141
1 vote
0 answers
45 views

What's the name of the transformation that can remove horizontal convergence from a picture?

Say that you are taking pictures from a street like this one: As you can see, the picture is taken perpendicular to the direction of the street. The problem is that cars at the left look as if they ...
Lay González's user avatar
7 votes
1 answer
708 views

How to match Blenders polynomial lens distortion model with GLSL?

I'm trying to re-implement Blenders (libmv) polynomial lens distortion model using shadertoy, in order to apply the lens distortion in another application ideally by generating a STMap for that. I ...
brockmann's user avatar
4 votes
1 answer
374 views

Tesselation sine distortion?

I am experimenting on a simple wave tessellation shader. I ported it from a working vertex shader. When my frequency is higher than 1, I get strange "saw-tooth" artifacting at peaks of the wave. Here ...
scx's user avatar
  • 169
1 vote
1 answer
375 views

Forward Rendering Distortion Effect

(example of effect i am trying to render) Rendering Transparent Object in forward rendering is far easier. However I am having an issue when it comes to transparent glass like object that applies post ...
Blue Bug's user avatar
  • 321