Realistic view materials overlay / protrude incorrectly

[phLB628]

Why does the abvoe happen in realistic view? The fascia can be seen on the right and it is consistent on the entire edge of the roof, it is set with an offset but still "protrudes / overlaps" in realistic view .

The view "twitches" and the materials come in and out, depending on which angle I have the view. This has happened for a long time and I cannot "fix" it.

The veiw exports as seen so it's not a hardware issue.

[barthbradley]

Does setting the View Phase Filter to Show Complete help?  

[barthbradley]

Could also be that the fascia is too thin. This is a known and documented issue.  

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Revit-Hidden-lines...

[phLB628]

The fascia is 5mm thick, I can try and make it thicker though it's pressed metal so will be thin. I've increased it to 15mm from 3mm and the bottom now happens where the "protruding materials" is less on the right hand fascias and worse on the left hand fascias...:

The phase filter is set to "compelte" I have tried it in other states but it makes no difference. 

[barthbradley]

Just post the file here.  The RVT. 

[phLB628]

I would post my model but the file is 357MB in size!

However, try this:

https://we.tl/t-JSwEBOR2OU

Thanks for your help!