Correct seachnasaigh, a very clear answer.

And I just noticed a typo in my own message/
It should read 2048x2048 not 2048x2046

Basically you can use any texture size, but you are throwing memory away and slowing Poser down.

Stick to the standard is good practice and memory friendly.

Texture size is just like poly count. Bigger is better, but at what cost?

I work in different texture sizes and those sizes depend on the detail required for that particular material zone.
Each texture for each material zone, be it diffuse, specular, bump normal or displacement will have to load and all these "cost" memory.

That is also why I use procedural shaders. They cost very little in memory and CPU time. Procedural shaders are very "cost" effective.

PS : All my free stuff here (like these Roman figures) use procedurals. No textures at all.
Even the forest walkers, or the Jacket and Mexican outfits are all procedurals.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!