1024x512 textures - how?
polycounter lvl 14
Part of my process of trying to get better at all things 3D involves trying to fix a severe character flaw of mine: not being able to ask questions because fear of being laughed at, and thought of as a complete newb (which in some ways is true).
So here goes.
I don't quite know how to make 1024x512 (or 512x256, etc, you get the idea) texture layouts. When laying out UVs I always fill the positive 0-1 X,Y space, and that gives me a Z^2 layout. But for a 1024x512, I don't know how I should go about doing this.
Do I lay things out between the X-1 and X+1 space, and still use the Y0-Y1 space? You can call me a newb if you like, it's all part of my "therapy"
but I would also appreciate some help in regards to my question 
So here goes.
I don't quite know how to make 1024x512 (or 512x256, etc, you get the idea) texture layouts. When laying out UVs I always fill the positive 0-1 X,Y space, and that gives me a Z^2 layout. But for a 1024x512, I don't know how I should go about doing this.
Do I lay things out between the X-1 and X+1 space, and still use the Y0-Y1 space? You can call me a newb if you like, it's all part of my "therapy"
but I would also appreciate some help in regards to my question
Replies
In max's Edit UVW's window, click Options, uncheck Use Custom Bitmap Size, and the texture will be whatever size you made it isntead of forcing it into a square.
Oh, and I realised I used X and Y, when I'm supposed to use U and V :P
Dunno if it's the best way to work, but it does the trick for me.
I was doubly at fault. Not only did I not know how to do what I ask, but I was also perceiving the problem incorrectly. So again, many thanks
I'm working on unwrapping models using 512x2048 textures a lot, it's a lifesaver... I'd hate to have to work in a square or manually squash stuff up to fit into the square afterwards.
Blender is an example of a 3d app which rotates uv coordinates in screen space regardless of texture dimension.
However last time I tried to do this in Maya, if you use a non-square image ratio, it actually distorts all of the UVs by that amount, and doesn't take the scale difference into account when rotating UV shells, so they get stretched twice as wide when rotated 90 degrees, rather than staying consistent relative to the texture size. That means you then have to scale them back, which is not only irritating, it's slow and unnecessary.
And I dont see how insisting on always working square can be practical. Sure, you can get away with it most of the time, but I had to UV a very long, thin object mid week and in that case I really dont see how you can comfortably work like that.