MAMEWorld Forums - EmuChat - Question about scaling of HLSL effects

Hello, I have a question for the good folks here regarding HLSL effects.

I'm about to get a much better PC, and I therefore upgraded my MAME emulator to access all the effects I couldn't use before, such as HLSL. For now, I'm using the raster.ini and vector.ini files given by default with MAME 0.178. I'm currently designing artworks for each game I have in my list so the games are displayed at the perfect resolution on my widescreen 1920x1080 TV, but I noticed something weird while working on my 1280x1024 monitor (my monitor and TV are both wired to my PC):

When, to get a quick look, I display vector games embedded in their widescreen artwork on my 5:4 1280x1024 monitor (and therefore appearing in a quite tiny area in the middle of the screen since the artwork is widescreen and I don't crop it), the bloom effect seems intense relatively to the game. But when I display the same game with the same settings on my monitor with the artwork cropped, the bloom effect is extremely minimal, like it is on the TV.

I conclude that the bloom effect doesn't scale to the game itself, and is instead absolute. Why is that? Raster games have effects that seem to scale according to the games (to my naked eye), but not vectors? What effects are absolute vs. relative to game area on screen? Is it just bloom that doesn't scale relatively to the game? I'm trying to understand how it all works and I'm a bit confused by this specific point.

Thanks.

EDIT: just in case - I'm using MAMEUI64 (I don't think it makes any difference, but you never know).

Edited by Simbabbad (10/22/16 06:33 PM)