So I'm playing around with some APAC conversion, and I'm having some issue with getting the correct colours when running on Altirra. I know the precise colouration of the emulator isn't a goal, but my results are wildly different from what I expected...
Here's an image showing what I mean. The left image is the input PPM (portable pixmap) file as mapped to the Atari's NTSC colour table, the middle image is the resulting APAC BGP file, as rendered by Atari800MacX and the BugBiter240i Pic viewer v3.0. The third image is the same image, run within the same pic viewer, as viewed in Altirra 2.9. PS: click on the thumbnail to see the image, there's no banding in the real middle image.
Now both of these are set to NTSC with XL/XE artifacting. Atari800MacX is set to 'smooth' scale mode and Altirra has 'Frame Blending' set on. I know Phaeron has said that you have to tune the colours for your own monitor, but do they really start this much off ? Or is something else going on here ?
I know there's a version-3 of Altirra out, but 2.9 is the latest one I know of that's been configured to "just work" out of the box on a Mac. I know nothing about windows machines (I can count the number of times I've used one on one hand) or configuring Wine, so I'm using what someone else has made available.
Any ideas ?