Render subsurface scattering via convolution over vertices on the mesh.
The method can be divided into three steps:
- Gather influx around each vertex of the mesh using path tracing(or rasterization if no surface light is involved in the scene).
- Transfer the influx buffer to OpenGL.
- Use compute shader to do a
$O(n^2)$ convolution over the mesh, transforming the influx into efflux. - Use the efflux(color) at each vertex to do fragment shading.
To use the repo, pass a json file as the first argument to config the scene. You may refer to scenes/*.json for examples of such configuration.