Originally posted by Eelco
I'd be interested to know how to cut a circular hole in a polygon face myself actually. Or at least, how to make a circular curve on the face that could be extruded.
Anybody?
This is how I would do it.
One - make the poly cube and cylinder, position where you want.
Two - Select the poly first (as thats the one you want to keep), then the cylinder second.
Three - click polygons -> boolean -> difference
Four - Select edges the you want extruded. Extrude 
Something like this
Pic 1 - the two objects
Pic 2 - objects selected. Notice the white of the cube vs. the green of the cylinder. This is key if you want to keep the cube, and lose most of the cylinder. If you find that the wrong object has been changed when performing the difference tool in the past, try selecting them the other way round.
Pic 3 - Whats left after the difference tool has been applied, with the edges selected.
Pic 4 - Edges extruded and X-Ray view just to see the edges that are left. Delete what's not necessary
Thinking about it of course, if you only need a round hole in the poly cube surface you could stop after point 3, then just delete the edges that are left by the cylinder.
Last edited by azimuth; 11-03-2005 at 03:31 PM.