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  1. #1

    Light edge falloff additive to other lights

    Where two lights outer circumference dim area meet, it looks like the lights become additive on the overlay.


  2. #2
    The fact that lights are additive creates all sorts of problem areas, like this. The luminance of a pixel needs to be the maximum of all light sources, not the sum of them.
    overlapping lights.PNG

  3. #3
    Kelrugem's Avatar
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    Quote Originally Posted by flashgordon View Post
    The fact that lights are additive creates all sorts of problem areas, like this. The luminance of a pixel needs to be the maximum of all light sources, not the sum of them.
    overlapping lights.PNG
    Or the addition should be with respect to their brightness/colour It looks like that dim+dim=bright is applied here which creates such jumps to bright areas

  4. #4
    I concur.

    Dim + Dim = Bright makes for some ugly-looking jumps, and I don't believe rules systems use Dim + Dim = Bright for system effects either. Two dim light sources shouldn't make a bright light source in the overlap.

    Worth a play around with the suggestions to try max luminance, or max luminance and add colours to see what looks nicest.

    Cheers, Hywel

  5. #5
    pindercarl's Avatar
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    Quote Originally Posted by kevininrussia View Post
    Where two lights outer circumference dim area meet, it looks like the lights become additive on the overlay.

    Thanks for sharing, kevininrussia. There is an issue with the lighting that cause the dim regions to render at half the expected brightness (i.e. half rendered at one-quarter). This did not impact the areas of overlap, so light that overlapped had a gradient of bright to half-dim to bright. This should be fixed in the next test channel release.

  6. #6
    Kelrugem's Avatar
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    Quote Originally Posted by pindercarl View Post
    Thanks for sharing, kevininrussia. There is an issue with the lighting that cause the dim regions to render at half the expected brightness (i.e. half rendered at one-quarter). This did not impact the areas of overlap, so light that overlapped had a gradient of bright to half-dim to bright. This should be fixed in the next test channel release.
    nice, thanks

  7. #7
    Here is the same scene with same settings in new build. There is still an additive to the light overlap.


  8. #8
    pindercarl's Avatar
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    Quote Originally Posted by kevininrussia View Post
    Here is the same scene with same settings in new build. There is still an additive to the light overlap.

    Yes. Lights are additive.

  9. #9
    Carl, is that by design, or an error that is being looked at?

  10. #10
    pindercarl's Avatar
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    Quote Originally Posted by johnecc View Post
    Carl, is that by design, or an error that is being looked at?
    That is by design.

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