Creating a eraser plane or object?

RexRed

Is there a way to create an eraser plane or object?

Like when you turn the sky off in Daz it creates a checkerboard pattern that is a transparenecy in the render.

Can this same checkerboard be applied to objects as well?

felis

You can create an Iray section plane node and hide anything behind, so it will be transparent.

RexRed

Hmm, that sounds interesting Felis, I will look into that thanks!

I was trying to think of a way to leave the HDRI sky on, but still get a gray transparency background front facing my camera. 

The plane seemed like a possibility I could maybe make the plane in front a unique color and key it out later in photoshop.

Or maybe use canvases in some clever way.