[fvdessen]

As an artist I frankly wonder what's the point of these texture books if you can't re-use the textures in your own works. It's like an audio sample pack where you can't use the samples, or an algorithmic book where you can't reuse the algorithms ...

[aeturnum]

You can re-use the textures in your own works. You can even create a new original work, using the textures as a reference, and pay nothing. The only thing you can't do is use the reference textures directly in a new work without securing an additional license.

I'm pretty sure that, by volume, most art is not sold in a commercial environment and its creators could use the book without concern.

[philjohn]

Different audio sample packs have different licensing terms - some confer full rights to use them in an audio production, some only in non-commercial productions with commercial requiring a license to be purchased.

Similarly, in this case, it's a reference book - and there just so happens to be verbiage that says "for commercial use of any of these, contact the author".

[moate]

What kind of artist are you? As a painter, I can tell you there's use in having textures to reference while you draw things yourself. It's more like buying an image off getty to get the watermark off but not paying the extra 20 dollars for commercial use.

[prpl]

You're familiar with the Numerical Recipes books?