Houdini, Redshift

Fluffy Clouds – Snippet Vol.5


The goal was to achieve a simple cloud setup with Houdini & Redshift, just with fractals and without simulations.
To avoid one single huge VDB grid, i decided to pre-cache volume instances and scatter them back on geo.
Down belowe i summarise some steps for my simple fluffy cloud setup.
cloudcarpet

1.Started with one single piece to check fractal animation.

simplecloud_animated

2.Create multiple static instances per frame and cache them out.

simplecloud_randomshapes02

20 x 13.0 Mio-18.0 Mio VDB’s

3.Scatter points on a noised grid and add the dummy-geo to previz the cloud carpet. For randomness some stamps on pscale, orientation and shape (here 10 shape variations).

simplecloud_carpet_previz

4.Point positions are used for instaces, based on the attributes. A rough fog VDB is added to fill some gaps and to mimic some kind of haze around the clouds.

simplecloud_carpet_points_previz

5.Rendering output with the redshift volume shader. In Fusion i added rays, background, color-corrections.

simplecloud_carpet_shader

6.Some test with a explicit form. A heart. Sweet…
cloudcarpeheart