Hi, its been a while since I encountered this bug but I am unfortunately having the same issue again. I will provide the file. This may be of help for trying to replicate the bug-I believe it occurs when you change object materials in the rendered view, especially when you select the same material multiple times, changing its colour and subsequently rhino creating multiple copies of this material. Hope this helps. Happy to provide further information if needed. Thanks.
PhippsMc2fl EMF.3dm (10.4 MB)
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@Mohamed2 Thank you for the model and the information. I will try to reproduce. One question: In what version of Rhino are you experiencing the problem. I see from an above post that you had Rhino v7 in use, but this model is saved in v8?
No problem. Yes, when I initially enquired about this issue I was operating in rhino 7 on a mac. I have since switched to windows and experienced the same issue with rhino 8.
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