Introduction:
If you've ever wanted to have a high-gloss metallic paint finish on a Bryce object, than maybe this will be of some use to you.  It's based upon PRX rules and uses a sub-pixel illusion to create the effect.

The gloss is controlled by adjusting the bump amount:
The shader will go from crystal hard to rubber.  The default setting is a point at which the illusion works well.  If you increase the bump amount you will increase the gloss and work your way up to a very hard-like finish.  If you decrease the bump amount you will decrease the gloss and work your way down to a rubber-like finish.  It is important to note that this setting is VERY sensitive.  Adjusting the default value by even 5 will have a very noticable effect on the gloss, so be very subtle with this setting.

The colour is controlled by the Ambient and Diffuse colour setting:
As with PRX, simply keep the Ambient and Diffuse colours the same.

The metallic flakes are controlled by the scale of the bump detail:
This setting is always dependant upon the distance the closest point of the surface is to the camera.  I call this a "Sub-Pixel" effect because it relies upon the detail being smaller than one screen pixel.  This is because the gloss really isn't shiny at all, and the illusion is created simply because the size of the flakes are smaller than one screen pixel, therefore rendering it impossible for you to know it wasn't really smooth.

Study the Render:
You will notice that the ambient white object is reflected with a nice sharp edge, just as it would do in a reflection.  However, the really cool thing is that immediately on the outer edge of that reflection, you will see a soft whilte halo where the surrounding flakes are still able to reflect the ambient white object (this is an illusion).  Likewise, you will also notice that 'within' the white area of the reflection, a trace of the colouring and flakes of the object itself are still visible (again, an illusion).  Look accross the center of the sphere and notice how the flakes blend as if not effected by the outer glossy coat.  In laymans terms, there is an effect of having two materials in one; a metallic flake base coat covered with a glossy top coat.

Tips for learning:

• Never adjust the camera or scene objects as it is ideal for testing the metallic finish.
• Never change more than one setting at a time until you understand the effect of each.
• This effect is very limited in use, please remember that.
• This can be improved, so please share any improved settings with each other.

Download Link:edited by bobbystahr at pumeco's request**
**http://www.renderosity.com/mod/freestuff/index.php?user_id=233697
I hope you will find this useful, car bodywork, stuff like that.