Add textures export when textures can't be found and notex is enabled

[rmn20]

I want to load png textures from folders in my engine using texture names from bsp, but qbsp never exports texture names that it cannot load, even if notex is enabled.

[rmn20]

Maybe I should use the Quake 2 map format instead? But it looks like qbsp still can't load png files(trenchbroom uses them). I checked the source code and it looks like the compiler can only load wal, pcx and tga...

[ericwa]

Sorry, long overdue reply..

Yes, q2bsp would be best for this, we added png loading some time before 2.0.0-alpha1 as well.

For q1bsp, 2.0.0-alpha5 adds -missing_textures_as_zero_size which is like -notex but it will make qbsp write the size as 0x0, along with the name, if it can't find the texture. (with just -notex, if the texture can't be loaded by qbsp, we omit both the name and the size)