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How to make a light from inside the object and cast shadow on the surface?

aiman.call_64d7601090aiman.call_64d7601090 Posts: 33
in The Commons

Hi there,

I'm trying to make a Native American tent(tipi) with person inside and a source of light. The camera is outside so expected result is to cast the shadow of that person on the surface of the tent.

I was experimenting with lights and material opacity, glass shader, etc. What I'm thinking about is a shader (caustic) or something like that but I'm not experienced enough so any ideas or suggestions are very welcome.

 

Comments

  • Richard HaseltineRichard Haseltine Posts: 107,973

    This is handled by translucence - are you rendering in 3Delight or Iray?

  • linvanchenelinvanchene Posts: 1,386
    edited February 2016

    You made me curious how that works in Iray.

    Made a quick test scene with

    - a cone

    - G3F Starter Essentials

    - Default Lights and Shaders - Fabric Velvet Red

    Diffuse Weight set to 1

    Translucency Weight set to 0.5

    image

     

    The .duf with the test scene is attached as a .zip

     

    Iray Transluceny weight.jpg
    1920 x 1080 - 452K
    zip
    zip
    Iray Tent flat wall v1001.zip
    279K
    Post edited by linvanchene on
  • aiman.call_64d7601090aiman.call_64d7601090 Posts: 33
    Richard Haseltine said:

    This is handled by translucence - are you rendering in 3Delight or Iray?

    3delight

  • aiman.call_64d7601090aiman.call_64d7601090 Posts: 33

    @linvanchene

    Awesome! Many thanks! I'm going to play with it, yay :)

  • SzarkSzark Posts: 10,634

    To get translucency in 3delight use Uber Surface which should be under Shader Presets > omnifrecker > Uber Surface. To apply shader hold Ctrl (CMD for Mac) down when applying shader and choose to ignore replacing maps.

  • aiman.call_64d7601090aiman.call_64d7601090 Posts: 33

    Many thanks !

    tipi2.png
    1280 x 720 - 1M
    tipi1.png
    1280 x 720 - 842K
  • SzarkSzark Posts: 10,634

    which render engine did you use as it turned out well.

  • aiman.call_64d7601090aiman.call_64d7601090 Posts: 33
    Szark said:

    which render engine did you use as it turned out well.

    3Delight - always

  • SzarkSzark Posts: 10,634

    LOL

  • aiman.call_64d7601090aiman.call_64d7601090 Posts: 33
    Szark said:

    LOL

    The reason is: rendering time. I have one HP workstation Z230 with:

    • HP Z230T – Intel Core i7-4790 – 3.6 GHz Processor
    • 16GB ram
    • HP NVIDIA Quadro K620 2GB Graphics
    • 1TB 7200 RPM hard drive

     

    I was testing Iray with GTX960, 16G RAM and A6 6400K 3.9GHz CPU and the rendering time was tooo long, more than 30 minutes per frame so for 3 min animation 30fps would take 2700 hours or 112 days.

    Trying Nviadia Cloud Rendering failed, it won't work easily with Daz3D and there is big buttle neck: each frame is around 200MB so it is around 1.08Tb - how to transfer quickly that amount to remote server?

    So I decided to go with CPU rendering only as is lower cost comparing to GPU. 

    Now, I have network drive with frames(RIBs) and workstation with Puppy Linux(30% faster than windows) and 3Delight processing each frame around 3 minutes or less - acceptable

     

     

     

     

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