@B2K2K4: I didn't mess with the sliders; the place to mess with is the settings in the raster ini (or it must be removed, or?). I recall now in my similar-themed Joust thread a couple/few months ago how jezze talked about the raster ini settings, though I recall they didn't work for fixing Joust. Removing the ini has done that for it as well. Beauty.
( jezze ) > I said it's the raster.ini, that changes the colors. What I didn't mention was, that all presets are included by default. Sorry, for the misunderstanding, but I thought it would be obvious by the default inipath setting .;ini;ini/presets.
Looking back at your first response, I realize I just didn't register the first half of it, and I didn't really get the whole of it, instead thinking something else. I think because I had the intuition the raster ini wouldn't be read unless selected or something. I like the idea of preset (conceptions). I also think MAME is pretty accurate in basic color scheme and in most games I know and all. For example, Joust and Indy, of which I've recently seen in person.
In any case, that's an interesting CRT example of Indy. I think the monitor may've been old, combined with relative to the wear display settings. The image conception is pretty cool, too. The main thing for me is being able to see the details of each board - in particular the boiling pits in the intro screen, and the rock walls of the mine.
Here's a, rather old but still accurate-seeming to me, vid of Indy. Notice the shading of the mine walls, seeming to me to infer different shades from brown to black. The boiling pits are definitively brown, perhaps with spots, pixels dotted through the murk, of green. Like a boiling bog pit. This is how it looks with .104 and slight boosts to 1.15 of brightness and gamma. Pretty rich, a red-brown in fact, almost vibrant but for that outside of Windows my monitor is a little age-dimmmed. I'll try to get some external shots.