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Question regarding shadows

trashkollectortrashkollector Posts: 22
in Daz Studio Discussion

When I render a genesis figure, by default I get the shadow that is cast by the figure. I want to see this.

However I am also seeing darker regions that are not really part of the figure's shadow.

This causes issues when I import  transparent (PNG) MOV files into a video editor since you will see a dark rectangular region around the genesis character.

Does anyone know how I can eliminate this, but still keep the shadow of  the figure itself.

About the only solution I can think of is that i create a huge canvas and put the figure in the middle, but I would rather not do this because the MOV files are going to be extrememly large.

 

Comments

  • meganappstatemeganappstate Posts: 85

    Are there other objects in the scene that can cast shadows,, like cameras (including a default camera, assuming it's enabled), lights, etc.

  • trashkollectortrashkollector Posts: 22

    I do have a camera.. but only for the purpose of locking he scene at the exact location.

    Not really for lighting purposes.

  • Richard HaseltineRichard Haseltine Posts: 102,218

    If you are using an HDRI as part of the lighting then it will cast shadows in all directions. There is also an issue with transparency in the current version of Iray that may be a factor.

  • trashkollectortrashkollector Posts: 22

    See attachment... This is how the transprent mov file looks.

    shadw.png
    401 x 157 - 60K
  • SpaciousSpacious Posts: 481
    edited June 2021

    It looks to me like you rendered the figure in a different size frame than the background, and that what you're seeing is the boundary of the rendered frame and all the shadows that your figure is casting.  If you line up your figure in the right place in the same size frame as the background, so re-render it, you should be fine.  Alternately, I'm going to guess that you used an HDRI for light, which is great, but they tend to cast shadows in multiple directions, and thats a little harder to predict and control.  

    Post edited by Spacious on
  • FishtalesFishtales Posts: 6,161

    The figure is floating above the ground so the shadows are correct. Lower the figure to the ground to meet the shadows. If they still persist then change the ground from auto to Manual.

  • trashkollectortrashkollector Posts: 22

    I attached the X,Y,Z translates.

    But they are all zero.

    dazsettings.png
    314 x 326 - 21K
  • FishtalesFishtales Posts: 6,161

    Some assets don't sit on the ground and float above it when Ground is set to Auto. Change the Ground position to Manual and lower the asset until it meets the ground. Turn off Draw Ground too if you don't want the shadow to be burnt into the transparent .png.

  • trashkollectortrashkollector Posts: 22

    If it I lower the figure, the shoes start disappearing.

    I guess the shadow is dispersed like that in real life, so its probably accurate. (maybe I can play around with dome roation as well to see if this makes any difference)

    I reduced the shadown intensity to 0.3 instead of 1.0 and now that residual shading is nearly imperceptible where it just about blends with the background.

    The shadow isnt as intense, but I can live with this.

     

  • trashkollectortrashkollector Posts: 22

    I was messing around this with some more..

    The Dome Rotation plays a big role in producing this shading.

    By default I was using Dome Rotation 0 deg.

    Changed Dome Rotation 45 deg,  with shadow intensity 1 (default), and the shading looks nearly perfect.

    So with this setting the figure's shadow has good intensity, but the residual shadow is nearly gone.

    Anyway, it seems to be a decent work around.

     

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