Transformers was a fascinating game at the time of release (2004). It's got the best grass rendering and vegetation on PS2 bar none (MGS3 excells at that too, and it's got better leaves. Can't forget the forest map in Jak 2 as well).
Unfortunatly, this game makes use of an ugly frambuffer "Motion Blur/Ghosting" effect, that's better known as "Trails", think, GTA III and VC.

Hardware mode's messy, but Software functions well enough.