This is a problem with OpenGL games on MP, I've already fixed it, I may release a hotfix for it just to get it out of the way.
Version 0.13.0
Still having an issue trying to get this OPENGL game to show in OBS MP. Using Add Game capture it does not see the game with 'Capture any FS application' checked, and with it unchecked and the game exe selected, it still does not see the game (not even any sort of red border, the only red I see is one little red circle in the upper left corner
I click on that circle and trying to drag or just makes it disappear) Take game out of FS mode, no change. Anti cheat enabled or disabled, same result.
Using Window capture mode.I can see the red border and I can see the game cursor, (if I alt-enter to get game out of FS mode) but not the game itself. Previous OBS MP version I got game cursor when doing game capture.
Here is the current log file
https://gist.github.com/0435724cb5f3ed55d634
Anything else you need, let me know, be happy to help get this resolved.
(Still works fine in regular OBS)