Help with 2.8 Cycles Reflections in Architectural Glass

Support Materials and Textures
4

The Index of Refraction of architectural glass / window glass is effectively the same as air, so I set the IOR to 0. But writing that I realized I hadn’t checked the IOR of air – the IOR of air isn’t zero, it’s one (1.0003). :flushed: Setting the IOR to 1 fixed the issue, thanks!

ReflectionTestCycles005
ReflectionTestCycles005800×500 319 KB

ReflectionTestCycles005.blend (738.9 KB)

Edited to add: Darn it, no it didn’t – I had Metallic set to 0.23, that’s where the reflections came from. Without it there’s no reflections, even though there should be. :rage: Still looking for help on this.