Hey guys right now I'm reading a book called "3D Game Texture Creation with Photoshop." In the section where he describes how to create a metal flooring texture, it tells you to apply a filter through Filters>Render>Lighting Effects to put on a spotlight. This is using a regular 1024x1024 white background images. But after I try, i go to Filters>Render, and it shows clouds, Difference Clouds, and Fibers, but Lighting effects and Lens Flare is greyed out and i can't selct It... How come?? PS i am using CS2 and havn't changed the presets (i mean this is like the 7th time i've used it)

I don't think the filter would work on pure white. Try coloring the canvas first. You could try adding a little grain or noise also.

If you are trying to use your background copy you wont beable to because that layer is locked!! You will need to right click on the layer and make a duplicate copy of it and then you will be able to do anything to that layer!!