This tutorial shows you how to create a procedural vein, that is composed of small segments that you have drawn by hand. This way the overall look of the vein is art-directable. While creating the vein you learn about concepts like matrix multiplication, quaternions and the primuv() function as well as looping in SOPs.
This is the first part of a two part tutorial, that deals with the creation of the vein itself. The second part (that will be released in 2 weeks) extends the setup with branches, hull geo and growth.
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