Grass (PhotoRendering Option)

These settings are available in the Detailed view of PhotoRendering Settings for the CineRender engine.
Pixel: No interpolation will take place - each pixel will be calculated individually. This method delivers the better results but also take the longest to render.
Vertex: The start and endpoints of segments are sampled and interpolated. This setting offers a good compromise between quality and render time and will lead to good render results in most cases.
Pixel: The entire grass will be rendered with GI. This is the slowest and most precise method.
Vertex: Only the grass vertices will be rendered with GI. The result is very similar to that of the Pixel mode but is generally rendered brighter because the grass normals are, internally, always oriented towards the camera.