Selective brush subtraction?

Is it possible to use brush subtraction in such a way that it only subtracts from selected brushes rather than from every single brush the subtraction brush overlaps?

And on a related topic; what's better for the players; overlapping brusehs with textured sections that are partially obscured or ten times (at least) non-overlapping brushes with no obscured textures?

[tZork]

ot exsactly, but SCG operations only work on visible brushes so: Select the brushes ya whanna CSG + any clipper brush. hit the I key to invert selection, hit H to hide. Any CGS will now only affect the remaning visible ones. hit shift+h to unhide when done.

Regarding teh second question; its hard to tell, but it sounds like you are bulding something in radiant that should be done as a model. if the geometry is that complex its hard to handle in radiant AND will produce messy vid (unless its a detail brush/es, in that case it could just as well be a model anyways)

This is what the region tool is for i think. Just select the brushes you want to deal with then hit region selected brushes. Then CSG will only affect the brushes in the region. Then turn it off

Thanks for the suggestions. Both your approaches seem to work for what I'm doing.

Regarding teh second question; its hard to tell, but it sounds like you are bulding something in radiant that should be done as a model. if the geometry is that complex its hard to handle in radiant AND will produce messy vid (unless its a detail brush/es, in that case it could just as well be a model anyways)

Nope. The jumbled brushes form the outer boundries of the map. While some of them could be done as details, most should be structural. I think.

If i remember right, i read somewhere, that this subtract tool from the GTK editor could occure Clipping errors.
I dont really know where i read that, but that one that wrote that, adviced to not use this tool.

I used this when i got startet with GTK, and there were serval clipping errors.
For Example, i used that subtraction tool to cut some cylinder out of a box.
Optical everythin was right, but i wasnt able to enter that free cylindric space inside that box.
I really dont know why, but since that i'm tryin to not use this tool.
Everythin u can make with that thing, can be made without it too.
In some cases its more work, but its definitly better to do the structures on ur own without using that tool.
U will definitly have more control, to the brushes by doin that things without that tool.