I'm a bit further with solving my question...
I understand I can use blendmapping. I learned that it only applies when adding additional textures, not the first one.
Here is my code:
test_obj = find free object()
make object cube test_obj, 100
set object filter test_obj, 0 // Filter off = pixel perfect!
set object transparency test_obj, 4 // 4 = best
set object light test_obj, 0
test_skin01 = find free image()
load image program_path$ + "\content\maps\test01\test_01.png", test_skin01
test_skin02 = find free image()
load image program_path$ + "\content\maps\test01\test_02.png", test_skin02
texture object test_obj, test_skin01
set blend mapping on test_obj, test_skin02, 15
The problem I now have is that the second texture is mipmapped, thus smoothing the pixels (which I do not want). I tried many different blendmodes but they all smooth it.
Anyone has an idea?
Regards Sph!nx