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Q: how to make bright blue sky in "sun-sky only" environment

FrankTheTankFrankTheTank Posts: 1,238
in New Users

I've been experimenting with the sun-sky environment render mode, and I was wondering, is there a way to change the background color of the sky without effecting the light color temperature? The only option I've found is to change the SS Blue-Red Tint, but thats unacceptable to me, because it changes more than just the background color of the sky, it changes the color temp of your lighting as well.

My only way to do this so far has been to turn off Drawn Dome and then put in a blue background in post production, but it seems like there should be a simple slider option to change the color of the sky, without effecting the light from the sun in the sun-sky environment.

Is there a way to do this? I just want to quick way to add a nice clear blue sky background without having to do it in post production.

Comments

  • Richard HaseltineRichard Haseltine Posts: 102,875

    The sky is providing light, so if you change its colour you change the lighting. If the sky wasn't providing light anything in the shade would be absolutely black, as it is (almost) in vacuum.

  • FrankTheTankFrankTheTank Posts: 1,238

    I realize that, but then how do some HDRs get away with having bright blue sky and yet the color temp is standard "white" 6500k light? For example Dimension Theory's outdoor HDR's Maui, has a nice bright blue sky but the light is not extremely blue, not to the extent of the sun-sky if you were to set it to the equivalent blue color. And technically it shouldn't be the sky providing light, it should be the sun, which is what seems to be happening with the HDRs, but not in the sun-sky is set up. It obviously changes the color of the sun and not just the sky.

  • Richard HaseltineRichard Haseltine Posts: 102,875

    It might help to post an image of the colours you are getting now, and the settings you are using.

  • ToborTobor Posts: 2,300
    DominicTesla said:

    And technically it shouldn't be the sky providing light, it should be the sun, which is what seems to be happening with the HDRs, but not in the sun-sky is set up. It obviously changes the color of the sun and not just the sky.

    In a properly made HDRi this is exactly what would happen. The blue part of the sky would be low dynamic range, and would provide little color to the scene -- though expect some; this part of what makes the color temperature of noon-day sun, is partially responsible for coloring the oceans blue, etc. The bulk of the light would be from a single point source of very high dynamic range. Your light takes on the hue of that source.

     

  • FrankTheTankFrankTheTank Posts: 1,238

    I'll post some comparison images in a few hours, I'm not at my pc and unable to work on this until later this evening.

  • FrankTheTankFrankTheTank Posts: 1,238

    Ok, so I figured out the really easy fix for this. Just change SS Horizon to -5 or -10, and use the sun dial to make sure the sun is low and to the back of your camera, i prefer back left. And you get a nice blue sky without altering the color temp.

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