Hi ! how is possible to make a wall like the one in the picture?
is not straight, there are rocks and dust (like in metro 2033, or stalker games)
any idea?
Yes, by modeling and good texturing.
yeah, but the rocks are modeling by separate or all together with the wall?
That’s ofcourse your own decision. Depending on your needs.
Though to give an attempt at answering what you’re probably trying to ask;
Ofcourse it’s perfectly possible to create walls of the quality seen in Daylight, Metro and Stalker games.
How this geometry has been composed is likely based out of one large main mesh (the hallway itself) which has been covered in multiple textures through splat/blendmapping or vertex blending.
It could possible to recreate this level of detail using multiple seperate baked meshes, but this would require tons more memory and processing power… however it’s probably at a lower level in terms of complication of production. (You can create everything straight-away in a 3d package, bake, export, import, done. Instead of also having to figure out, after making the meshes, how to paint it.)
The rocks are in this case not made through modeling though, you can see they’re flat. They’re displayed through displacement/tesselation and normal mapping.