I have an assembly of parts that I want to drop on a ground plane. They fall and bounce nicely, except that I need the assembly to stay in tack. Instead all the parts just fall apart. How do I keep them together?

Thanks!

the lazy way is to put down a pack sop. if you're using a bullet packed sim, they'll be treated as a single object.

the complex way is to create constraint networks to bind all the shapes together, but sounds like you don't need that.

Thanks mestela, especially for the demo file. I tried this, but unfortunately it makes everything into one material. In my file, I'm dropping a paint gun to the ground, but it is an assembly that has many parts, and many materials. It just won't do to have everything one color.

I wish the bullet solver could just treat the parts as a single part.

Any help would be appreciated.

Assign materials before the pack, then unpack after the dopnet, the original materials and stuff should be restored.

mestela
Assign materials before the pack, then unpack after the dopnet, the original materials and stuff should be restored.

Thanks! I tried this on a demo scene and it looked like it did what I needed. I'll give it a shot on the real file when I get back to work on Monday.