You would have to code it yourself for standard Blitz3D (ie. a bit slow). You could always use a DLL (FastImage, FastExt or other?).
image/texture inversion-negative
Blitz3D Forums/Blitz3D Programming/image/texture inversion-negativeThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.