How do I render an object in Maya using Arnold so that a single piece of geo receives light but does not render an alpha channel?
I basically need an interactive light pass that is illuminating light on a "black" plane which receives light from an animated mesh light above.
Any ideas how to get the plane to render "rgb" channels with no alpha. I am using using an Arnold Standard Surface shader on the plane. I am also not able to get the the plane to remain black just revealing the lit areas, despite have the base and spec weight set to 0. It seems it needs to have a slight dark gray surface color. I'd like to have the plane remain black unless black. Is it possible?
Any ideas?