PhotoShop CS Filter Not showing up?

[Deadcell]

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)

 

[captaincranky]

Hmmmm....

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.

 

[painterr]

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!!