Had the same issue of transparent ball after update BAM. I had dirt ball unckeck because I didn't like it. After checking the ball marks the ball is shown, but is brownish/gold looking.... hate it. So I think I'm going back to working version.
Same problem here...
LOVE BAM, but unfortunately there is a serious issue with the newest build. I use BAM in my pinball cabinet with 3 screens.
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On older BAM versions, if you had your playfield screen orientation in portrait (with NO rotation in video options), the ball would have a messed up ugly looking texture in all of BAM's lighting modes, except for "new renderer". In the "new renderer" lighting mode the ball would look normal, but way too bright,.
So FP would need to have the playfield screen in landscape orientation with 270 rotation. Then the ball in BAM would look beautiful in all modes.
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With this newer version of BAM, it doesn't matter what orientation your playfield is, or what rotation you use..... the ball ALWAYS has the ugly messed up texture no matter what in the same light modes...and "new renderer" still makes the ball too bright.
This makes BAM unusable for me.... I want my pretty ball back..... 
Is it possible to fix this?
Also, on a separate note.... when using "Force Arcade Mode", it works as intended and shows translite objects on the playfield which is good (like SLAMT1LT's Back to the Future time circuits), but it also causes movie clips (Tron Legacy, Nightmare on Elm Street, etc ) to play too fast and out of sync. This only happens when a second screen is enabled for the backglass in BAM. Works fine with only one screen. Any idea how to fix that?
Thanks for all your hard work!
Edited by TerryRed, 01 March 2016 - 09:26 PM.