# Light Modify

- Geometry
- Color
- Attenuation

Change here the color components for a single light or a list of lights.

To modify a light, click over the graphic area to open a menu and choose a light, or write its identification (name and number) on the Light entry. To modify a list of lights, press the button List (after creating the list of lights with Light->Select). Parameters for empty entries or Local choices remain unchanged.

To change a light name write the new name in the Light entry, followed by the light number (GAMGI needs the number to identify the light). To change the name for a list of lights, press List first and then write the new common name in the Name entry.

### Ambient

These R, G, B entries change the ambient color of the new light. This can vary between black (0.0, 0.0, 0.0) and white (1.0, 1.0, 1.0).

This component emulates light scattered so many times, that it does not depend of the radiation direction, or the materials surface. Wired objects cannot reflect diffuse or specular light, so they need some ambient light to be visible.

### Diffuse

These R, G, B entries change the diffuse color of the new light. This can vary between black (0.0, 0.0, 0.0) and white (1.0, 1.0, 1.0).

This component emulates light equally reflected in all directions (as the light reflected by a hammered glass). Solid objects need some diffuse light to show its tridimensional shape.

### Specular

These R, G, B entries change the specular color of the new light. This can vary between black (0.0, 0.0, 0.0) and white (1.0, 1.0, 1.0).

This component emulates light reflected mainly along specific directions (as the light reflected by a metal). Solid objects need some specular light to show brightness effects.
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