PBR - Wet Textures

[Maximum-Dev]

A) Specular shouldn’t need to change, UE4 uses metallic workslow, and the default value applies to most materials, look at the mud example with water here https://www.marmoset.co/toolbag/learn/pbr-theory

We don’t change the specular for non metals because the values are close, you are right. But values are “close”. My goal is to give each material it’s own unique value I gather from PBR charts. And the values I gather are within a range of 0 to 255. As you know, specular for non metals falls in the range of 43,43,43 (Water) to ~94,94,94 (Skin) sRGB. That’s quite a difference. And here I have problem translating them to the 0 to 1 range.
The Epic themselves have specular maps for their Kite Demo assets too so I no longer feel comfortable ignoring the little differences.

B) I haven’t see it officially listed anywhere, but I’ve seen some forum posts suggesting accurate sky and sun values, like PBR lighting questions - Rendering - Epic Developer Community Forums

Thanks for the link.