During battling with the concept of using Cycles nodes for particle distribution I’ve found one thing that might need some attention.
When transparency/alpha is used for shading, Cycles renders hair particles with interpolated children with black artifacts.
Steps to reproduce:
- Change rendering engine to Cycles
- Create particle hair system on default box.
- Set particle number to 3000.
- Create new material:
VoronoiTexture —> ColorRamp (white=0,545, black=0.573) —> alpha input PrincipledBSDF
- First render.
- Add children (interpolated) to particle system, set render amount 50 (arbitrary number that clearly shows the artifacts).
- Second render.
3000 hair particles, no children
3000 hair particles, interpolated amount 50
3000 hair particles, interpolated amount 100