Apr 06, 2017 · In this course, Maya Dynamics: nParticles and Expressions, you'll learn nParticles and expressions for various effects and no prior knowledge is required. First, you'll discover how to block out particle emitters, nParticles, and external fields. Once you have a new render layer created open up the render settings window and under the Render Using drop down menu select Maya Vector. Now select the Maya Vector tab within the render settings window, this will allow you to adjust how you want your line pass to look. Hello! I'm working with Maya 2018 with Arnold 5. I'm trying to create an absolute override for Primary Visibility on my object. With the render collection and mesh selected, I right click Primary Vis and I don't see any 'create relative/absolute override' option in the drop down list.