Rear projection material

I’m making an internally (rear) projected object and trying to choose the material. I’ve been testing spandex, which will be great for achieving a smooth projection surface, but I’m a bit worried about the amount of internal reflection.

the rear side is brighter than the front side and I worry the whole object will light up too much when part of it is projected on. This will always be the case to some degree but is there a better material choice that will allow more transmission and less reflection?

I’m on a super budget to these must be commodity materials - no gerriets pvc for me.

I was thinking about ripstop nylon…

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