In 3ds Max 2013 and newer, the BAT4Max buttons don't work correctly, and you need to manually change a few settings in order for your renders to turn out correctly. This is because starting in that version of 3ds Max, new features were introduced to the Mental Ray renderer, and those features were turned on by default. The default settings were the wrong settings, and since BAT4Max was made before those settings existed, it doesn't change them when you press the buttons. I had actually tried to edit BAT4Max to fix this in the past, and it didn't work and I was under the impression that it was just broken, because some other people also weren't able to get it to work. Anyway, I tried it again just now and it seems to work, so it might depend on your version of 3ds Max. Try this out and let me know if it works or not, and what version of 3ds Max you're using. If it works then I'll add it into the main installation instructions for BAT4Max.   To make the BAT4Max buttons work correctly: Go to C:\Program Files\Autodesk\3ds Max Design 2015\gamepacks\BAT\scripts or wherever you have 3ds Max installed. Open SF_LtbL_functions.ms in notepad. You need to edit the function SFFG1 and SFFG3. Press Control+F to open the find menu, and search for: fn SFFG1 = ( Add the following lines to SFFG1 and SFFG3: myRen.UnifiedEnable = false myRen.ScanlineEnable = false myRen.IBLEnable = false   It should look like the screenshot below. I made the added lines indented differently so that it's easier to see.