Thanks so much for your responses. I guess for the render side of it, the projected texture is perfect.
I do unfortunately need to model it correctly further down the line. I know it is easy enough in Rhino, but I only have extremely basic rhino knowledge.
As it is part of an ongoing product development, it will need to be modelled, tried and tested, various times. It needs to be a very specifically sized, exponential spiral, which makes it difficult.
Jeff, was it rhino that you would use to do it as a one time thing? Is there any chance you tell me the tools you would use, if so?
Thanks again.