Hehe... actually, all of you got some parts of this right ;). It's powers of 2, and the real reason for this is your video card hardware (and/or low-level 3d display-drivers, not the software). Since Poser uses a software renderer, there's probably no difference in whether you use power-of-2 dimensioned textures or not. Apps that use hardware excceleration (Direct3D, OpenGL, etc) on the PC want them dimensioned that way because that's what the hardware wants (and if it doesn't get them that way, it converts them internally to power-of-2 dimensions before using them). Anyway, to answer your initial question, all of these 4000x4000 sized textures are really overkill in most cases (since the character on your screen/render is rarely that tall), so assuming that your paint program has a decent scaling feature, you won't notice much difference until you get down below 1500 or so (depending on whether it's a full-body shot or an extreme close-up, obviously). Note also that the 'body' texture really should be 6-7 times taller than the head map to keep them in the same proportion, but the head map is typically just sa tall as the body to handle face close-ups.

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