Adding lightmap and bumpmap

[Veleno]

Bad news: I reproduced the problem and talked to our Vizard programmer and he believes that the Vive itself doesn't currently work with 32-bit, and at the time of this post there doesn't appear to be a quick one-line-of-code way to just briefly switch back to 8-bit just before sending the data to the headset.

8-bit exposure works, with the limitations stated above, but you may be stuck rebaking on this one.