Hello everyone, I’m embarrassed to say how long I’ve struggled with this issue and used various bad workarounds. Decided to give it a go again and see if I could find a solution. I’m happy to say one thing that works quite well for me is a setting in the Groom itself. Look for “Scatter Scene Lighting” on the Strands tab and turn this on. This worked quite well for me. The groom looked much better with Skylight/Lumen GI/etc. In my case these bad reflections would show up only in certain camera angles and lighting setups (almost always when I was shooting a dark interior with a bright skylight and directional light illuminating an environment outside a window). This “Scatter Scene Setting” could require some changes to your Groom material and may not be desirable in certain lighting setups. I think it should probably be a tool in your toolkit to resolve this kind of thing rather than a one-stop-shop that fixes all Groom reflection issues. Very possible it may cause problems elsewhere so keep an eye on it!
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