Quote - So are you saying that DAZ  provides the vendors with these textures and then the vendors go and map them? I would think by now there would be at least ONE person out of all  these hundreds of thousands of Poser merchants who would want to make some texture sets for people wanting high resolution.

Or does DAZ tell them they have to stick to a certain resolution standard? I've noticed that all texture sets I have are in non powers of two, like 4000x4000 or 3000x3000, while the industry standard is to use powers of two, since that's how a graphics card deals with a texture - 1024, 2048, 4096, etc.

You can thank older version of Posers texture limit for this, they were limited to 4096^2, yet since P7 that limit has been increased, but the venders still insist on catering for the older versions, and every DS user has cursed them for it, as DS can use whatever your computer can cope with.