3d max - Unwrap UVW, lightmaps.

Gerbeiter

I have lots of objects in my scene, and I would like to unwrap UVs for them to bake lightmaps. I decided that 4 lightmpas (2k x 2k) was enough.
But the problem is with unwrap UVs for the objects. I can't unwrap UVs for all objects at a time becouse there are to much of them and my computer will kaput. So, I divided objects for 4 parts. But how can I preserve (to keep) ratio for all (4) unwrap maps?

renderhjs

I wrote a script that can apply texel scale to a set of objects or calculated from 1 object.
http://boards.polycount.net/showthread.php?t=60553
http://www.renderhjs.net/textools/
the part I mean in particular is:



You basicly pick a object with the pick button and it will fill out the pixel size in squares and the associated per unit value. Once you picked the values from a object select the ones that need the same ratio and hit this button



MoP who wrote the normalize script behind this button wrote his normalize script (make the ratios equal) in a way that it only works for just 1 object and it's UV layout if I am not mistaken. So maybe your scenario would be a nice thing to add to that script.

anyway those might be some options. What booth scripts basicly do is resizing UV shells/islands proportional so that they fit the ratio they need. It does not in anyway rotate, skew or move your island- just proportional scaling. Once that is done you propably still need to re- arrange the shells so that they do not overlap but that is something you can do then once you normalized them.