I am rendering to texture on a room that I have been working on and I keep getting an error message. After the poly is all set up in the RTT dialog box and I click the “Render” button, a window pops up that is titled: Invalid Output Directories. Then it lists the path that I have already RTT’d to quite a few times. Any ideas?
3ds Max 2010, Lightwave 9.5
NVidea GeForce GTS 240
Intel Core i7 CPU 960 @ 3.20 GHz x8, 12Gb Ram
Open the RTT menu and check the Output:Path at the top of the menu. Re-select the path to where you want the finished RTT lightmap maps to go, and give it a test RTT.
Most likely moved the folder you were lightmapping too (this will cause this error) or just a minor bug, changing to a different folder or new folder should also fix it and then you should be able to revert back to your original path.
Not certain this will fix it but its worth a shot, If the problem persists you may have to post a max file, as it may be an issue with the file itself.