Glow

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`Glow`

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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.

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Glow[]

specifies that there is no glow.

Details

Glow is added to diffuse and specular reflection components to determine the final rendered color of a surface.
Glow is a color component independent of simulated illumination.
Glow[] is equivalent to Glow[Black].
A surface can be specified as having an absolute color col by giving the combination of directives Glow[col], Black, and Specularity[0].

Examples

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Basic Examples (1)Summary of the most common use cases

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

In[1]:=1

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https://wolfram.com/xid/0mrfxy-etsum

Out[1]=1

Scope (2)Survey of the scope of standard use cases

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

In[1]:=1

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https://wolfram.com/xid/0mrfxy-ivgf2

Out[1]=1

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

In[1]:=1

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https://wolfram.com/xid/0mrfxy-c94z5c

Out[1]=1

Applications (2)Sample problems that can be solved with this function

Use a pure color function with no lighting interaction:

In[1]:=1

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https://wolfram.com/xid/0mrfxy-f7e0qv

Out[1]=1

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

In[1]:=1

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https://wolfram.com/xid/0mrfxy-kmu2fc

Out[1]=1

Possible Issues (1)Common pitfalls and unexpected behavior

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

In[1]:=1

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https://wolfram.com/xid/0mrfxy-gotav4

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0mrfxy-qawbo

Out[2]=2

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