Is there a way to change brightness on a Sky?

Omniverse Archive Samples & Examples
1

The night sky on the Environments tab is still very bright. I would expect Night to be dark unless illuminated by something.

Thanks

Night Sky

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2

@DataJuggler there are several ways to change the brightness of a sky; and, it really depends on what you are using. for your specific use case of a premade procedural/dynamic skies from the environment/sky browser, i can offer a few options and am sure there are other methods to achieve the result you may be looking for:

  • environment param in sky browser - since you are already using a dynamic sky, you could leverage the time of day slider to adjust the sun/moon position and the overall brightness. each dynamic skies come into stage at different time of day; the night sky comes in at 9AM by default, so perhaps it’s where the root of confusion is. but this is why you’d want to change the setting after the fact. all clips below were taken in 2023.2.0 beta:
    EnvironmentControl
  • environment param in stage - you could access the same setting through the Stage panel. you will just have to select the Environment xform prim and you should be able to locate the exact same set of params in its property. you can confirm this by seeing the same values being updated at the same time.
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    EnvironmentControl_02
  • SkyMaterial params - the presets found in the environment/sky browser should come with a few components. in the case of the dynamic skies, you can find the SkyMaterial prim, which controls the skybox and emissive quality. the values to adjust can be found under PostProcess (such as Intensity and/or Exposure). in the clip below, you can see how it impacts your scene:
    SkyMaterialSetting

if you aren’t using the dynamic skies, you can consider other methodologies:

  • DomeLight lighting intensity - the HDR presets found in the environment browser behave differently than the dynamic skies mentioned above. you are limited to the pixel data of the HDR images themselves and the intensity of the dome light. below, the brightness of the HDR is being driven by the light intensity.
    HDRIntensity
  • camera exposure - this is just a general note, you could consider changing your camera exposure (ISO) to produce an overall darker scene. of course, you’d need to boost the lighting intensity of all of your lights to compensate if you want to preserve your lighting representation.
3

Thank you for the detailed explanation. I will try the time of day and the other methods.

4

I don’t see the time of day feature on the sky. Do I have to use an extension for that?

5

I found it, you have to select Environment.

Thanks

6

correctomundo, i mentioned it under the second bullet point just in case you missed it.

7

You can also simply lower the exposure of the scene or lower the power of the lights in the properties tab.

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