[WIP] Hand-drawn map features

[Morgan]

Ok, I've been experimenting with mountains for some days, and I find myself a bit frustrated. What I'm trying to achieve is a realistic effect for grounded, solid and convincing mountains, like in this map.

Now, don't laugh, these are the results of my efforts up to this moment (the black white version is the standard brush):

Now, this is just a sketch, I know I should draw details more carefully, but I think that is beside the point, I don't find the overall effect convincing at all. Since I think the basic brush is not bad (even if it can be improved) I think the problem is in the coloring/shading.

I drew the brush by hand and then scanned it. As for the coloring, the layers I'm using are:
- Brush outline (the default) set on multiply
- Highlight layer (hue/saturation set on hard light)
- Shadow layer (hue/saturation set on multiply)
- Texture layer (granite texture set on multiply)
- Color layer (plain base brown)
- Parchment background

Suggesions, anyone?