fluted effect is ruined in long shot, in close shot its fine. i think that normal for fluted effect uv scaled in weird way.
u can see material settings in right panel.
I’m here to help. I tried to replicate the issue using the same material settings you described, but I’m not able to reproduce the problem on my end — both the preview and final render display the moru fluted glass normally.
Here’s the view from the inside — if it helps, I’m rendering these in 4K, but that shouldn’t affect how the material appears in the preview, unlike what’s happening in your project.
If you can share to me a simplified version of your project file, I can test it on my end to see whether the issue is project-specific or related to the material/mesh itself.
Upload your file to WeTransfer and send it to support@d5techs.com. Write the subject as Ela_Forum_Moru Flutted Glass
Just let me know if the issue persists after you’ve done more experiments on your end. I’ll also continue to monitor this on my side as well. If this issue is confirmed to be persistent after your tests, I’ll go ahead and report it for further review by our team. Thanks