Using carve is sometimes a bad idea, especially if you're going to carve through complex geometry. That often leads to way more brushes than you need to make the doorway. In older versions of Hammer carving occaisonally created geometry with leaks in it as well, but I'm not sure whether that's still true.

However, if used under the right circumstances carving can be a simple way to save time when you just want a rectangular hole through a rectangular brush, even better if the hole adjoins the edge of the brush (making the carve not a hole but a notch).

The real key is not to get lazy and use carve for everything, as simple holes through walls are not very interesting doorways. Eventually you probably want to have doorframes or arches, and your walls may have trim or other complex features. In those cases it would be a bad idea to use carve to create your doorways.

use seperate brushes , build them around your door, or use clip tool, and then when you used clip tool you often need to optimeze the wall by deleting and rescaling some blocks.

seperate brushes is the easeist way for a simple wall

i think theres a good clip tool tutorials around here somewhere (egirs site if it aint on snrakpit)

i can tell you did not search this topic out cause, there are enough comments to melt your hard drive posted on this site alone about the effects of carving.

I agree with carving being bad. But don't forget to tie your brushes that make up your doorframe to the entity func_detail. Especially if it's a complex doorway.

not really, you must make the hole out of brushes, but you can clip the pieces that will eventually make the frame, assuming the hole is a door. you can clip the edges if you want debris, assuming its a blasted hole. you can clip all sorts of things to make unique shapes for your hole.

mapping is pretty much 100% trial and error. you seem to have a bit more error than most, but not tragically so.

my main issue is you seem to type your sentences with a reckless abandon for confusing me. how can things fly around?

i suggest you make test maps. small things that will compile fast. make your holes in them and perfect the process before you attempt it in your main map.

also, please work on your sentence structure, you are making people not want to help you.