In the options menu there is a drop down box for the scanlines effects, but it only seems to know about a few specific file names. I have many other effect png files in my artwork directory, but they don't show up in the drop down list. What am I doing wrong? If this is the default behavior, can you change the drop down list to a file open dialog and allow the user to choose his own effect file directly? Thanks!
Yes, this is currently the default behaviour - it assumes a number of specific .png artwork files.
I need to revisit this in the near future - added as a Feature Request so I don't forget it.
I've now fixed this in CVS - it didn't take long to implement, but the code for handling SDLMAME options was very ugly and it took me a while to work up the courage to fix it ;)
The effect combo box will now list any .png files that are in the specified MAME artwork directory.