merging textures

how do i put more than one texture on one brush face?

ive seen this blending / merging technique used so it must be possible for us too

how how how its driving me mental lol

any help or smart remarks appreciated :razz:

For a displacement surface, you can use the alpha painting to blend
between two textures, as seen in
Reno's
tutorial (though it is somewhat out of date; the paint alpha tool
now works fine.)

Note you can only blend between the two textures predefined in the material's .vmt file (though it's easy to make your own).

Otherwise, you can use overlays to put an overlay texture on top of a
normal texure; the overlay's alpha channel determines how the blending
between the two happens.