Apologies for clogging up the thread with posts. This is interesting and I'm learning a lot smile
After a little more tidying up of the Options, the command line QMC2 feeds to MAME looks more sane. There's just one bit still puzzling me, the '-bloom_overdrive 1.000000,1.000000,1.000000' argument. I found it in Options under Direct3D HLSL. That's a whole area of MAME I've never used and am not planning to, so it's Disabled, as per the default. Why then is QMC2 feeding it a default command line argument for bloom_overdrive? Shouldn't it only come into effect if I enable HLSL?

Last edited by Praxis; 02/27/16 10:23 PM.