Rest, VEX & Attributes
While exploring Houdini, I learned how to use VEX to imitate the behavior of the Rest and Color geometry nodes. The Rest node simply adds a new vector to the geometry spreadsheet called 'rest' which copies over the position values (P) for each point. The Color SOP adds a "color vector" called "Cd" to the geometry spreadsheet with the RGB values you select. I demonstrate this and also show how you can name the color data anything you want, and then copy it over to a geometry using the Attribute Copy node.
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If you want to make Hollywood quality visual effects (VFX), then you will want to learn Houdini. Houdini is a procedural system from Side FX Software that empowers you to create everything from realistic terrains, water effects, pyro simulations, and realistic assets for both film production and game development.