UV Mapping Issue - Mapping a 2048 by 1024 sheet

gibson543 · Feb 2011

Hey guys, I know this is a simple problem, and probably a one answer thread lol but i legit looked a lot and couldnt find anything, but how the hell am i supposed to create a 2048 by 1024 using the Unwrap UVW modifier in max, I'm not sure how to go about doing it if I'm supposed to change the size of the 0 to 1 space I'm really not sure, any help would be appreciated

thanks

Sean VanGorder · Feb 2011

In the UV editor, click on the options button in the lower right corner, and turn on "Use Custom Bitmap Size". Then you can set it to the dimensions you need.

gibson543 · Feb 2011

ah of course it would be that simple, thanks sean

Will Faucher · Feb 2011

This works, but seems to squish my UV space! How would I make it so that I keep the whole thing proportionate?

Cpt Ukulele · Feb 2011

You could do it like this:

- unwrap UVs in only half of the usual, square 0 to 1 space;
- on top of your UVW unwrap modifier, add a UVW Xform modifier. Set V tiling (or U, depending on whether you used a horizontal or vertical half) to 2;
- collapse stack;
- as Sean said, set your non-square custom dimensions in the Custom Bitmap Size field in the UV Edit window/options.

Voila! There are probably other ways to do it, but this should work.

Joshua Stubbles · Feb 2011

Max doesn't really support non-square UVs really well so you have two choices.

- Map everything to the lower 1/2 UV space, then export the UV map and crop it yourself in Photoshop. You can use the pixel offset tools in TexTools (search this forum for it) to make the scaling very easy back and forth.

- Map everything to a square UV window then export the map and scale it to the correct res in Photoshop. However, TexTools supports exporting of non-square textures, so it will export a crisp UV texture if you set that res, instead of resizing in Photoshop and getting something blurry.

gibson543 · Feb 2011

useful info joshua thanks

renderhjs · Feb 2011

as for the TexTools reference, read more here:
http://renderhjs.net/textools/
In particular the extend canvas (hidden under 'Tools') will make it very easy:
texTools3.5_extend_uvs.jpg

MatthewS · Feb 2011

I usually map the stuff onto half of the box then stretch the uvs to (roughly) double the size then when you go to render the uv template you just put in 1024/2048 into the res. Comes out fine for me.

Bigjohn · Feb 2011

Has anyone ever figured out a way to have stuff like Relax take into account a non-uniform map size?

renderhjs · Feb 2011

just work on a 1:1 ratio and revert back once done. Deep down at its core at least 3dsmax still assumes that the base of every UV is a square or cube (UVW), it doesn't really translate to non 1:1 ratios and thats why most tools just fail with it.
Then again a non square map usually is not really that GPU or render performance nice, maybe merge it with another texture?

UV Mapping Issue - Mapping a 2048 by 1024 sheet

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