Making holes

[barly]

I am working on a simple model and am having trouble creating holes that penetrate through the floor and ceiling slabs that are 5' thick. I recently had someone helping me and know that this has something to do with being "inside the group" that I'm trying to penetrate through. If you are not in the group, the shape made that should penetrate through ends up being a solid instead of making the hole. I'm missing a step here.....can someone help me?

Thanks!

[remus]

Generally, if your block has parallel sides you can just use to push a hole through the geometry.

However, if the sides arent parallel youd have to extrude the shape you want to cut through the slab then move it in to position, select the whole thing->right click->intersect with selected.

As you said, all this needs to happen with ungrouped geometry (or geometry all in the same group) for it to work.

Itd be useful if you could post a model showing your problem btw, hard to say exactly what the problem is without an example.