The "cell shaded" look

Ok i have seen these AVs running around where you can see the inside as a diffrent color an they have like a black boarder around them. gives them a somewhat cell shaded look, i have fiddled with it and can get the look.

I make both objects transparent and place one over the other...... thing is when i change angles it will switch colors on me.

How do i set it up to have one clean color inside and one clean color outside (clean color meaning that it dosnt like change no matter what angle you look at it.)

Rez sphere
Hollow 95
Set texture to blank
Set texture color to black
Set sphere begin and end twist both to 180
Switch to "Select texture" tool and select the sphere's surface
Change texture color to while
Deselect
Voila

You can adjust the thickness of the outline using the hollow parameter

I thought that you had to use 2 prims for this effect, but wow, Candide, that twisting a sphere makes for some really weird behavior!

I tried this technique on a cube, but it doesn;t twist the same. So for a cube how is it done?

For cubes, you can get away with putting the outlines right on the texture since cubes are always outlined at the edges. However, if you're curious about the 2-prim method, here's how it works. One prim forms the "outline", and the other constitutes the "fill".

1. Hollow the "outline prim" to 95%, and put a fully transparent texture on all exterior faces.
   
   
   
2. Put a blank texture on the inside, and set it to whatever color you want the outline to be (usually black).
   
   
   
3. Now, put a second, slightly smaller prim of the same type the inside the "outline prim" to make up the fill.

There you go. Now the two prims will appear to be one cell shaded object. If you want to maximize the effect and make the object look more 2-dimensional, eliminate shadows by setting both prims to full bright.

Thanks for the explanation, Chosen. That "full bright" tip is a good one, too for either cartoon technique.

I had also posted a tutorial about this a while back:

/8/5b/30811/1.html

I personally don't like the twisting; it generates an inconsistent effect depending on who's viewing it. The 2-prim method's a bit more time consuming but everyone sees the same thing no matter where they're looking.