They're too unnatural a shape in my opinion. That looks like a rock sticking out the sea because it gets thinner at the bottom. Obviously some of these would be a good idea, but make some flatter ones that get wider at the bottom. Think logically about how the rocks were weathered into that shape.
The new texture looks better, but desaturate the green a bit. Even algae isn't that bright and colourful.
What's with the need to sell them aswell? If you're just in the modelling for the quick buck, you won't make anything decent. Slow down, use it as modelling practise not a money making scheme, as I can't see anything about that model or texture which makes me jump up and down and wave my wallet about.
Clearly everyone prefers your volcano, why no release some versions of that too?
Paul
