I'm trying to use HLSL under mame64ui .191
I followed the advice on this YouTube video:
https://www.youtube.com/watch?v=Q0vJrmXHydU
that tells you to delete existing ini files and start with one provided in the comments.
It seems to work except I can't get the HLSL slider controls to show up when I tab or tilde from within the game.
On the game properties from the main UI, if you go to Advanced->Select Effect I can choose an hlsl function (one only)
like shadow mask or scanlines, so I think it basically works, but how to easily change the parameters like in the video ?