I was wondering if it’s possible to make part of an object light up using a plain effector. For example, suppose I have a really long rectangular prism in my scene and I want the luminance channel to become yellow if a plain effector with a box falloff passes through the object and black otherwise. However, when object lights up, the whole thing shouldn’t become yellow; only the part within the box falloff of the effector.
Here’s a video showing the problem: https://www.youtube.com/watch?v=jwCXkUYPDbk&feature=youtu.be
I can’t figure out how to do this without making the whole thing light up. Any ideas?