Tuesday, 23 April 2013
What has already been done
From what I have seen most forest rendering in computer graphics is based off of rendering many point sprite trees either in order, or with some kind of alpha cut to eliminate z-buffer artifiacts.
Simple Point Sprite Forests
Cylindrical Point sprites only look good from ground level
"We would like to show that it is feasible to use three cross
billboards to realize a fast and realistic rendering of a big
forest in our software ForestRoam: Forest Rendering and
Simulation with Image models."
Certainly rendering a large forest scene would have to include a point sprite for every tree- for realistic scenes this would require an astronomical number of sprites- many thousands for a single frame...