Windows 10 and Windows 8.1
Simple graphic card and Nvidia graphic card
Short description of error
When I reproduce grass in a large surface, and distribute it by weight paint, the distribution of grass seems don't follow the area I define with paint, and it seems to be more diffuse in inclinate surfaces instead of plane surfaces...
Exact steps for others to reproduce the error
I attach a Grass.blend example (zip file) with a big surface and simple particle system settings.