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Outdoor iray lighting question, sun overexpose lighter color objects

mahhenmahhen Posts: 73
in The Commons

Ok, here's my problem. i'm trying to do outdoor scene (pool or whatever, have pretty much same issue in every outdoor scene). Well anyway, sun overexpose some areas especially lighter color areas for example pool tiles. If i try to redusing environment intensity then scene comes darker and even sky is darker. forgot to mention, i'm useing hdri sky as light source (terradome 3 ones mostly). 

I have also tried to attack this problem by adjusting shaders of the problem areas, but nothing seems to help. Only way that helps little, is that if i change shaders to darker ones, but there must be easier way to do this. Pool tiles are usually white and in real life brighter sun only makes them more visible, not another light source. And yes, all my materials are iray. 

I have also tried to adjust camera settings, but i haven't got very far in this. Adjustin shutter speed helps little but it also makes whole picture darker.

So here is my problem, very noob one and mostlikely easy one, but i'm pretty sure every one of you had same problem in your noob days long long time ago in a galaxy far far away and then you find answer to that problem. 

So what is it please tell my release a noob from his agony.

Comments

  • agent unawaresagent unawares Posts: 3,513
    edited April 2018

    First, keep in mind that white in the program, as [1.0, 1.0, 1.0], represents perfect diffuse reflectivity. Nothing in real life is actually like this. Better color for white is more around [0.8, 0.8, 0.8], to represent that the surface does absorb light.

    Second, in real life it is also sort of a pain to expose both bright white objects and dark objects at the same time. One way to get around this is by combining exposures into an HDR image, and tonemapping that. In DS, though, you don't have to combine different exposures to do this. You just render a Beauty canvas. This will get saved as an exr in a folder next to your regular image file. You can then tonemap this in Photoshop, Natron, Nuke, Blender, whatever, to reflect exactly the dynamic range that you want to see.

    Post edited by agent unawares on
  • FaveralFaveral Posts: 416
    You can also adjust exposure in the tone mapping tab. If your scene is too bright adjust it up it will mainly affect the brighter areas and tone them down. Increasing it by one might be enough. This control is pretty sensitive.
  • WonderlandWonderland Posts: 7,134
    edited April 2018

    You can adjust Burn Whites (I think that's what it's called) in tone mapping and/or make the tiles light grey instead of white.

     

    Post edited by Wonderland on
  • mahhenmahhen Posts: 73

    Thanks guys, you really helped me a lot. I really hope that i had been interested in fotografia before starting in daz, it might had helped a lot in learning curve.

  • PadonePadone Posts: 4,017

    What @Wonderland means is "burn highlights" in the tone mapping settings. Setting it to zero will resolve your problem. The reason behind this is that this simulates the human eyes behavior where the iris aperture always adapt to the lighting conditions so you never get overexposed spots.

    The other suggestions in this discussion are fine as well.

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