I need some help with a lighting issue.

wmfl1980wmfl1980 Posts: 18
edited August 2023 in Art Studio

Hello, I can't figure out why the light I added to my scene doesn't show on my model when I enter Nvidia Iray mode in the viewport. The first image is the result I want, and the second is what I get.

What am I doing wrong, and how can I correct this?

I used Imgur because "Attach a file" isn't working for me.

Thank you.

Image 1, what I want.

Image 2, what I get in Nvidia Iray.

Post edited by wmfl1980 on

Comments

  • felisfelis Posts: 3,712
    edited August 2023

    How are you lightning the airplane?

    And have you  set it to scene only in render settings?

    Upload of pictures have been broken for a while, but it usually works around 18:00 to 24:00 Daz time (US MST).

    Post edited by felis on
  • wmfl1980wmfl1980 Posts: 18

    Thank you for your response, Felis. I used a single distant light. I didn't have it on scene only. When I changed that, the whole jet became black for a minute, and then little white dots began to appear in the area it should be lit.

    New screenshot.

  • felisfelis Posts: 3,712

    It looks like your light needs to be stronger.

  • wmfl1980wmfl1980 Posts: 18

    I put the intensity and Luminius Flux paramiters into the quintillions. Nothing changed. Is there a different way to incrase the light's strength?

  • Wheer is the light aimed? It looks to be pointing more-or-less up, so the sides of the mdoel facing the camera are receiving only a few bits of light that happen to bounce just right off other parts of the model. You should be able to select the light from the Camera/View seelction list at top-right of the Viewport - do that and make sure that it is seeing the parts of the model you want lit, at least for the most part.

  • wmfl1980wmfl1980 Posts: 18

    The light is below the jet, pointed up, and the parts I want illuminated do appear in the light viewport.

  • and in the camera view? With only a dsitant light in the scene most of the plane is going to be dark regardless.

  • wmfl1980wmfl1980 Posts: 18

    Yes, I want most of the jet to be dark. I want the lighting from the first image to apply to the second, which has the hi-res textures.

    Image 1 shows what I want the Nvidia Iray image to look like.

    Image 2 shows what I get when I switch to Nvidia Iray with scene selected for a light source and the camera light turned off.

  • felisfelis Posts: 3,712

    Have you set 'Draw Ground' to *Off'?

  • wmfl1980wmfl1980 Posts: 18

    Setting Draw Ground to off helped considerably. I'm left wondering why I had so much trouble with such basic lighting. Every other render I've done has never required any of the fixes the two of you suggested.

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