OSB Sheathing showing through standing seam metal roof


MN_JohnH
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This is a fairly common occurrence where my OSB sheathing appears to be showing through my standing seam metal roofing when in physically based mode.
Any thoughts on this?

 

Thanks

 

Roof problem.jpg

garage.plan

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26 minutes ago, Designers_Ink said:

It is actually a reflection that looks like OSB.  Change the material to a matte finish or change the roughness to 100% using the rainbow tool, and it goes away.

This looks like it might be one of my free textures i give out, not a reflection, its part of the effect of having a really effective normal map, same goes for interior flooring or siding
You can do as ahomes suggested though I would use a metal texture instead

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On 5/7/2024 at 8:57 AM, ahomes said:

@MN_JohnH I add a layer between the metal and OSB @ 1/16" for tar paper so its black.

This is the solution. This 'transparent' edge effect is quite common for some materials with a normal map. A color matched surface underneath is the solution. If you don't want to add a roof underlayment layer, you can make the OSB layer black, but the underlayment makes more sense. This same approach can be used to solve similar display issues for certain board & batten types of materials as well as for some tile textures with normal maps.

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