Is there a method to exclude an object from a render?

I need to do a low res render (2d/cubemap/scenerender or whatever) that runs alongside the main player camera (maybe on a slower tick), but does not render the player mesh (assume 3rd person style template), but the main camera should still render that mesh?

I don’t want to turn the player character off visible while this render happens as then there will be a flicker.

Does anyone know of a way to do this?