hey
i haven't got any sites to reccommend, but i just wanted to point out that for a lot of contexts, especially architectural, a 'futuristic' look can probably be acheived with some fairly simple geometric designs. if you're making a futuristic building, and you want a texture for the floor or the walls, then you can probably make something that'll do the job just fine, quite quickly in Microsoft Paint. that's what i usually do any time i need a texture for a building.
of course, if you've got photoshop or something, then that's even better
on the subject of making textures - i've noticed that anim8or's texture engine will downscale any imported image to the nearest binary power (2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, etc etc), so if you use these numbers as your picture dimensions, then when you import them to anim8or, they will already be a binary-power size which the texture engine will like, so they won't get pixels left out, and they'll look their best on the models. personally, if i want a large square texture, i tend to go for 1024x1024, unless it's to cover a really, really huge area, in which case i use 2048x2048.
- colclough