Billowy Cloud

This scene file shows how to create a simple billowy cloud, including two render setups:

  • An ambient occlusion volume is generated to speed up rendering without using any ray-bounces inside the cloud.
  • While the more realistic method is to enable ray-bounces inside the cloud.

(2 responses)



Attila Torok is a London based FX TD working for SideFX. He has started out as a SideFX internship student after which he worked for Double Negative on projects like The Hunger Games: Catching Fire, Godzilla. Before coming back to SideFX he spent 4 years at ILM, where next to a list of movies like Doctor Strange, Avengers: Infinity War, Ready Player One, Star Wars: The Rise of Skywalker, he was building and maintaining tools for particle simulations, deformable and tearable rigid body simulations and for pyro used throughout the company.

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  • eddishin 3 weeks, 5 days ago  | 

    Thank you, Attila Torok.

  • localstarlight 3 weeks, 2 days ago  | 

    When I try to render the ambient occlusion version, the cloud is basically just pure white, looks totally blown out, and now adjustment of the lighting seems to make any difference.

  • ati 3 weeks, 1 day ago  | 

    Make sure you are displaying through ACES. (Edit -> OCIO Settings...)
    Also on the pyro shader (/obj/simple/cloud_occlusion/materiallibrary1/karmabakedcloudmaterial1/kma_pyroshader1) try to lower the Intensity Scale parameter on the Scatter tab

    Let me know if that helps

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