How do I create a pre-shader

Drogo Nazhur

Let's assume I have a shape -- a circle or square or triangle. Now let's say that I want to put a letter or symbol in the middle of that shape. How big do I make the image? How do I get the cornoers to line up and how do I center the symbol in the middle of my shape.

And would I have to do anything special to make that symbol appear to have a 3-D effect?

felis

When you are sating in the middle of, I assume you mean as part of. And then if would depend on the UV wrapping. You would basically look at the UV map and use that to place your letter/symbol.

And to give it some 3D effect, I would put it through and image editor that can convert a heightmap (black-grey-white) to a normal map.

Richard Haseltine

UVs are relative, so the size in pixels could be whatever you needed as long as the elements were correctly placed within the image.

Drogo Nazhur

So I have a shape here. Let's just use this for example.

If I go into Paint, how do I know where to begin the image and lets assume I was to put a "P" in the middle. How do I know where the middle is or how big to make the symbol so that it does not overflow the image

Ascania

You put your UV map template onto an overlay layer in your image editor and use it as reference.