Well its not serious, but I do need some comments on this initial texturing attempt. The texture is of course just some lines, drawn with a small paintbrush tool in photoshop.

1) Is this texture big/sharp enough?
-From afar, I think the texture-file-size will do fine!
-But how about really close up?

2) This is a 2000x2000 pixel big jpeg file. Any comments on file-type for use as a texture file?

3) I will look into how to place textures the right way soon, but please show off with your knowledge if you feel like it.

I need a "static" placement/projection ontop of the main disc, so that the texture remails circular, and not skewed like in my example.

Does photoshop have tools for vector graphics??? Thus, enabling me to simply scale things at a whim. Or must I simply start with a big and properly sized canvas, in order to achieve the proper sharpness in the grapics?

Dont mind the multiple use of the same textured shader, it is the main disc that is important.
And the yellow crosses is just some residue from a scale action, before I drew the dark gray lines a last time