Welcome to FFDN Background

Hullo guys, this is just a background, but since the foreground will most likely take some time, i will submit it. It belongs to a group painting for a clan of runescape (www.runecape.com), calling itself the ffdn, (fast free double nats), a company founded to well..assist in the crafting of natures at a nature altar.

The picture shows said altar.

Anyway I would very much appriciate if people could give me suggestions of how to improve the picture before handing it into the rs gallery lol. The moss, i know, looks stupid, the hanging one, as one said so nicely "mammoth", but i struggle to fix that. I cannot get rid of it since the rock below has ahm...errors (proportions and al that dont match)tried to lessen it but that was no good either..so ..help?

other than that, general suggestions'd be welcomed, too, of course. Thanks.