Hans, i've changed the North position and daytime as you suggested. Here's the render: http://www.freeimagehosting.net/2r49t
As you can see, all seems really plastic. After changing some textures the final result improved a lot, but i'm trying to have a more realistic grass in Blender (there's a thread on the bar section of this forum), with no luck because when exporting to .dae i lose textures and hair that simulates the grass. Other suggest? Thanks!

PS: what is the difference between step 3 and 4 of the rendering presets in SH3D. i see a less aliased images, but a lot more sharpness...