Now there are more than 500 000 trees rendered as billboards, but the furthermost ones are just a pixel high. Even more distant tiles, that have texels covering larger area than 2x2 meters have the trees just baked in as colors (in a marketing-speak it would read as hundreds of millions trees rendered, but if you get to that parts you'd really see the trees there, so .. ). I shall use a different approach for the far billboards though - the frame rate dropped considerably, from 350-600 to about 60-100 with the trees (on 8800GT), and it chokes ati x1600 mobility on my nb to ~12 fps.
Nevertheless the trees nicely show the scale of the world and the ranges of detail that is generated by the fractal algorithm.
Replying to the comments in the previous entry - we should soon produce some videos too. That is, if the other two lethargic programmers here manage to create something during my one week offline vacation (going to forests