# Light Modify

- Geometry
- Color
- Attenuation

Change here the attenuation parameters of the light (or list of lights, previously selected with Light->Select, when Global is pressed). Parameters for empty entries or Local choices remain unchanged.

### Axial

Change the Constant, Linear, Quadratic parameters that control the axial attenuation. This is defined only for positional and spot lights. The axial attenuation factor is given by:

    Axial Attenuation Factor = 1/(constant + linear*distance + quadratic*distance*distance)

### Radial

Change the radial attenuation, defined only for spot lights. The radial attenuation factor is given by:

    Radial Attenuation Factor = [max (0, vertex . direction)]**radial

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