Implement non-textural graphic eye-candy

[iksbob]

Per-polygon material characteristics such as:

• Glow, allow definition of typical glow-when-damaged polys and always-glowing polys (preferably with a definable value)
• Glossiness/flatness, affecting shading with respect to light sources (from darker color with well-defined specular highlights to the original flat angle-from-light-source shading)
• Transparency, aka alpha channel
• Refractive index, bending of light rays (would require a ray-tracing engine probably)
• Metallicity. There's probably a better name for this, but mirror-like properties.

World/engine effects:

• Color, size and diffuseness of light sources. In addition to tinting map object colors, these would control the characteristics of specular highlights and:
• Shadows. The edge being blurred depending on the size of the light source. Ideally the light source diffuseness would affect the density gradient of the blurring, but... math.
• High dynamic range lighting effects. Color desaturation, glare and (sigh) lens flare.

Because there's not enough real issues that need attention.