Submit your concepts of objects, textures, maps etc. And I'll gladly do my best to provide you with custom environmental assets/props under two conditions:
1. I'll hand you the SMD models and the JPEG/TGA textures, but YOU have to create the SKM/MD2 and the WALs respectively, it's the biggest pain in the arse and the reason I avoid making stuff.
2. You need to release the SKM/MD2 and WALs along with your map so that other developers can use them.
I just want to see some better maps that don't feel like boxes in a bigger box.