picking an invisible entity

I'm curious if there's any obvious solution to creating invisible entity materials, so that that still 'exist' in the scene and could be picked, but aren't visible in any way at that moment.

Setting alpha levels to 0 removes them from the scene. Using really low alpha levels works OK, but slightly affect the visuals.

Any hope or is slight visibility necessary for the scene to acknowledge it?


I believe our method for picking relies on the entity being visibly rendered on the scene.

What are you trying to accomplish? I might be able to suggest a better method for doing this.