Posted this in the Tutorials subforum, but hardly anyone checks that forum, so I'm going to try again here.

In most (read all?) of the DoD:S maps, the destroyed walls have a smooth ruble edge, I was wondering how to get that smooth effect, because it really looks better than the hard-edged ones..

I figured it would be the displacement/subdivide tool, but that stretches the textures beyond any hope, also you can't make displacements func_details, so it might get hard while rendering. So I guess that's not it?

Could anyone give me a few pointers here?

Actually I'm pretty sure it is displacements. I tried it recently and it kind of worked. You need to change the face or whatever in the displacement window from Normal to X or Y and stuff... Best thing to do is decompile an official map and take a look

displacements are the most common, but you can find models too.

Yup, take a look at flash for example. The first ruined building you come across is actually a model. The wall behind this is a displacement surface.

Aha, I looked over the fact that it could be displacement only :) don't know how I got at the subdivide idea.. Thanks a bunch, this will surely fancy my destroyed buildings up :)

displacement are very cheap to render by the engine, so don't worry about it.

Got a new problem, this shows up in the compiling log:
Material NATURE/BLENDMILGROUND008_2_PLANTS uses unknown detail object type militia_leaves_grass!

I guess this is a texture that should place foliage sprites all over the texture? But ingame it doesn't show the plants/grass.. How do I fix this?

the information for the havana detail is likely not contained in the dod source details.vbsp.

I think you're going to have to edit the texture yourself and have it as a custom one.

I'm mapping for CS:S atm, so that shouldn't be a problem?

I use vertex manipulation to get the walls as accurate as possible, then subdivide, then use Raise To with some small numbers to get a consistant roundedness for the edges, then use some Raise/Lower to make it natural. The stretching is usually minimal, but a little bit usually make it feel natural.