My first thought was - OK, these are conversions with cloaks sculpted on (I saw the grey as bare plastic, and the green as green stuff). Then I noticed the painted head and the tree stumps....
I think the cloth used for the background mutes the picture a little too much, or maybe it's the light. The greys do not really stand out as painted to my eye.
It is very nice to see 40K figures with a drab scheme - I would suggest you put some contrasting colour on the mushroom 'hats' though - maybe a dusty blue or yellowish brown, to make them stand out from the Eldar equipment.