Glow

Glow[col]
is a graphics directive which specifies that surfaces of 3D graphics objects that follow are to be taken to glow with color col.

specifies that there is no glow.

Glow is added to diffuse and specular reflection components to determine the final rendered color of a surface.

A surface can be specified as having an absolute color col by giving the combination of directives Glow[col], Black, and Specularity.

Cylinder that glows red but has a black surface that reflects no light:

Out[1]=

Glow gives an overall surface color that is independent of any Lighting:

Other surface colors still interact with lighting even if Glow is given:

Use a pure color function with no lighting interaction:

Use a color function based on the phase of a complex function:

With Glow, objects can look flat if edges are not drawn: