VRay for SketchUp Manual
Lighting Dialog Box
Below are all light types'
details supported by V-Ray for SketchUp. Each light content is different. Other
then color, multiplier and shadow on/off, each also has Subdivs for shadow
quality control, Photon Map for render quality control, Caustic Subdivs control
and Bias for shadow offset. The difference is only with Point Light which has
the ability to adjust the radius of shadows.
Point Lights are the ones that need to control the Decay itself: Linear,
Inverse and Inverse Square. The last two Decay dramatically. So when using
Inverse or Inverse Square, you must increase the multiplier. That means Point
Lights are very much affected by the distance from an object, so it will take
longer time to adjust these lights.