I finally figured out how to import Spore Collada files, and everything is working exactly as it should, except for the bones. If I move my creature's arm, its leg moves along with it.

I think what's happening is that the bone has too big of a radius of stuff it can move. I have no clue how to change that, unfortunately.



Here's the .blend file if anyone needs it.

The mesh in your scene file doesn't contain any vertex groups. It's relying only on the armature's envelope radius, which includes a little of the leg (you can see it on your screenshot as a brighter area). To properly tell the area a bone has control over, you'll have to paint the weights for them.

Is there any way I could just lower the envelope radius?

Yeah, you can do this by selecting the bone in Edit Mode and changing the "Dist" parameter from the buttons window ("Editing" section). It won't make it easier though, these spore files aren't really made to be used by animators... They're an overcimplicated mess of (sometimes overlapping) bones that is very hard to sort through, and they have generic names like "bone48" or "part 876". Still, just in case you want to tackle the challenge, i suggest you enable "stick draw mode" for the armature, it will make it easier to see than the envelope-view on your screenshot.

to Nikprodanov,

He knows the stuff, glad people like him are around

regards