Creating realistic Glass with Lumen

Development Rendering
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Having a problem creating realistic glass when using Lumen. Following William Faucher’s tutorial for Raytraced glass and translucency and although it applies to UE4 as well I would assume the same material should work in UE5.

One issue I am having is that Refraction seems to have absolutely zero effect!
Can any Lumen experts chime in?
Attaching my current glass material

SimpleGlass_UE5
SimpleGlass_UE5865×752 76.2 KB

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If after a few months you are still wondering why, as it seems no one answered, your roughness is set to 5, whilst Faucher’s video shows 0.05 :slightly_smiling_face:

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