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Iray Lights keep ignoring me...

tuiveltuivel Posts: 0
in New Users

Hi everyone!

Lighting set to scene only, no headlamp, i can place lights, turn them on/off, change light temperature or emission color all no problem. Same works for emissives. But when rendering in iray photo realistic the light intensity never changes no matter what i do. Neither intensity nor luminosity sliders do anything. In the viewport that is set to "texture shaded" the lights however seem to react just fine. In the render it's allways the same. I have no idea what i am doing wrong, and searching the forums didn't help so far. Any ideas would be appreciated!

Thanks

Tuivel

Comments

  • ajknottajknott Posts: 15
    edited February 2021

    Are you adjsuting the Luminous Flux setting in your lights? you don't mention it in the list above.

    I don't touch the intensity slider at all - I change all the intensities using the Luminous Flux slider, almost at the bottom, just above the Temperature.

    This is for a fill light, and you can see that I generally find that I increase the setting well above the default 1500 which lights load with.

    Iray light fill settings.PNG
    562 x 871 - 254K
    Post edited by ajknott on
  • PerttiAPerttiA Posts: 10,024

    Have you tried "Scene only" in your render settings?

  • Sven DullahSven Dullah Posts: 7,621

    PerttiA said:

    Have you tried "Scene only" in your render settings?

    Mentioned in the very first sentencewink

  • PerttiAPerttiA Posts: 10,024

    Sven Dullah said:

    PerttiA said:

    Have you tried "Scene only" in your render settings?

    Mentioned in the very first sentencewink

    Sorry, it was too early in that sentence laugh

  • tuiveltuivel Posts: 0

    Yes it's set to "scene only" and yes i tried the Luminous Flux slider. It doesn't seem to do anything.

  • tuiveltuivel Posts: 0

    And thank you all for your input!

  • sebkopitzkesebkopitzke Posts: 0

    I have this exact same issue, have you found a fix?

  • tuiveltuivel Posts: 0

    Ok, i finally got some reaction out of my lights now however i noticed:

    1. I had to crank up the lumens much higher than i thought. At about 20.000 - 50.000 noticeable effects started showing. I was playing around mostly around 0 - 15.000.

    2. There where light emitting objects in the scene i hadn't noticed yet. Their light interfered extremely with my scene lighting - despite their lumens being a lot lower. When they were on, my lights seemed to do nothing, even at high lumen values. Turning some of them off allowed the lights i had placed to actually do something.

    So it seems i didn't notice my scene lights because some light emitting props i hadn't noticed were shining much brighter for some reason. Also at low color temperature cranking up the lumens seems to increase the "coloration" of the scene much more than it does the actual brightness. 

    Still not entirely sure how all this stuff works together, but i finally got some control over my scene lighting - yay :-D

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