Testing Cave designs. How is this for an overhead cave?

[Nickadimos]

Here is another one that im trying out.

[Jegol]

Honestly.. It looks good as far as I can tell. As a personal preference, i think the walls are very good and the shadow is just right. I like the second style a little bit more, though you could try toning the red down just a little bit more to a more even brown.

I don't know how this would look, but what if you put some type of pattern over the top of the rock. Maybe 20-100 pixels in (depending), so that the gaps between the tunnels will have something else to fill them.

Don't know if that makes sense to you