Doom3world

Is there any way to do some cloth animation in / for Doom 3? (non-interactive)

Other than doing it with bones in your modelling app and exporting to md5, no. You might be able to bake a sequence of normal map images into an animation to fake the cloth ripple effect but it would likely not look good enough for how intensive it would be.

Yeah, I figured my options are limited. There was MD5 exporter for 3DS MAX that would insert bones into each vertex and inherit vertex's animation upon export. However that option never came to Blender's exporter

That's one GOOD reason to use Darkplaces vs D3: the option for vertex or bone animations.

For cloth you'd have to use the articulated figure editor to make it cloth like. I did it once (several times actually, but one ambitious time). For my rock monster I actually made a giant sheet of paper to drop on him (in a rock-paper-scissors idea). It worked great, the collisions just weren't what I expected and it fell part way through him, not wrap around him.

If someone could make Blender 2 MD5 exporter that can get Blender's cloth and insert a bone per vertex, make each bone to inherit vertex's animation accordingly and export it into MD5, it would be awesome.