Im having a bit of a problem with my map. i have the mus_world objects and some yavin tunnels but the lava covers the enterance to the tunnel (you can still go through it, though. is there a code or sumthin that i cud put into the mus object to make it affected by terrain cutters?

No. The only way to 'cut a hole' in an object is with a 3D modeling program such as XSI or 3ds Max.

aw....o well....