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Hey guys! This is part 3 of our Houdini Cloud Tools tutorial. At this stage we have a solid foundation understanding how these new SOP nodes work at a lower level by mixing noises, and we also know how to combine this the VDB tools to make a Skybox and fill in sections of our sky. Now we can take this to the next level with the Cloud SOPs dedicated to building individual cloud assets.

There are several Cloud SOPs dedicated to generating our initial forms, and from these initial shapes we convert them into VDB volumetric data which we can modify using our Cloud Noises. We can also modify the incoming data further with dedicated SOPs for clipping or modifying the density and more. All these tools in combination allow you to have a ton of flexibility in the way the volumetric data is modified to model and sculpt away at our cloud assets.

Using this approach you can art direct and manipulate your cloud as needed and generate different VDBs to easily layout and render. In the end I duplicate these clouds a few times and lay them out in combination with our previous 2d high altitude clouds, 3d midground skybox clouds to get a full range of clouds in our shot. This was a fun tutorial using techniques I plan to use often to fill in environment backgrounds when needed. I hope you learned something new and enjoy making clouds in your own scenes. Thank you for all the support and have a great day.

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Patreon Tutorial #48 - Houdini 20 Cloud Tools - Part 3

Comments

Saul Espinosa

Hey Lev, pretty sure this was a bug in 3.5.21. In the recording I was already testing 3.5.22. This issue should be fixed with today’s release of 3.5.22, so give the new build a try. [All] Fixed a bug that would cause a horizontal artefact in volumes when volume trace depth is greater than 1

Joteva Studio

hey saul! you recommended using droop to animate the clouds in part 1. how would you animate the clouds done through this method?

Saul Espinosa

Hey Joteva, the Billowy Noise SOP has the Droop control in it in the "warping" dropdown menu. Enable the droop and then animate it using something like $F. So for example $F/50 or something to slow it down per-frame. Then just pick a direction. The default is on the +X axis.

Bob Debouwer

SOOO GOOOD!! thanks for making these videos!! it helps a lot !!

Saul Espinosa

Thanks Bob! Glad you like them and are learning something from them. Always great to hear people enjoy the content.