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Thread: How to add several light intensity channels in graphics editor

  1. #1

    How to add several light intensity channels in graphics editor

    Are possible add several Light Intensity channels simultaneously (with one click) in Graphics editor?

    Thanks!

  2. #2
    Scene Destroyer DrStrik9's Avatar
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    I assume you mean one light intensity control for multiple lights ... ?

    I don't think you can use the graph editor for light intensity without clicking on the "E" beside light intensity for EACH light. So setting it up is a bit more complicated than one click, but you can try using a couple of null objects, and Relativity. This allows you to control MANY lights by moving one null on the X axis, once you get it set up.

    Put a null object sitting at 0,0,0, called "zero-null" (or whatever), and another null that sits some distance away on the X axis, called "light-null" (Relativity likes lower-case object names!). For each light, in Light Panel, hit the "E" beside Light Intensity. This opens Graph Editor; go to Modifiers and Add Modifier Rel_Channeler. At the X: type "GAP(zero-null,t,light-null,t)/10" -- do this for every light. Then when "light-null" is sitting at 10,0,0 all lights will be at 100% intensity. Animate light-null on the X axis for intensity changes on all lights set up this way.

    Hope that helps.

  3. #3
    Thanks, DrStrik9!
    That is very helpful for many lights control at the same time!

  4. #4
    Super Member nickdigital's Avatar
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    Quote Originally Posted by intssed View Post
    Are possible add several Light Intensity channels simultaneously (with one click) in Graphics editor?

    Thanks!
    If all your lights have an envelope and the graph editor is set to track items selection, selecting all the lights should load them into the GE with their envelopes.
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  5. #5
    Quote Originally Posted by DrStrik9 View Post
    ......... X: type "GAP(zero-null,t,light-null,t)/10" -- do this for every light. Then when "light-null" is sitting at 10,0,0 all lights will be at 100% intensity ........
    Why is the value always remains 0.003% or 0.001% not 0%?

  6. #6
    Scene Destroyer DrStrik9's Avatar
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    Not sure. Are you keying the zero-null manually (entering 0 for X), and also manually for light-null?

    Can you really see .003% or .001% light intensity in renders? If it's really a problem, (A) Check Graph Editor for light-null position when at 0, make keyframes linear or if TCB Spline, tension at 1.0; also check position values in G.E. (B) or it could be scale related. (Just guessing here.) On one light, you could try replacing the "/10" part of the Rel formula with "/100", and set your X at 100m for 100%. If this works on one light, apply to all lights.

    But it works perfectly here as originally set up.

    Alternatively, you could use nickdigal's idea.
    Last edited by DrStrik9; 10-22-2012 at 04:47 PM.

  7. #7
    Thanks, DrStrik9! All works perfectly!

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