I'd try to differentiate plants, grass, and rock shading a little. It all combines in some places and just looks messing and confusing.
Well I have this snowy track I might post sometime eventually, haven't worked on it in a while My remix contest entry for R2 which I will probably never finish/post. Looks cool though And random crap drawings that will definitely never be posted In all I'm kind of in an artistic slump in terms of freerider, I hope to get working again soon though