>>2875422I went with default "emissive x4" materials in both cases (yellow in the case of Ray-MMD + a light that actually emits light instead of just volumetric fog).
The effect selection can be compared here:
https://pbs.twimg.com/media/GQ1k9WfWQAAsmlg?format=jpg&name=largehttps://pbs.twimg.com/media/GQw6I9uXEAAm9Jy?format=jpg&name=largeI also realized that I didn't use SSR in sdPBR for a more proper comparison, but the one that works in MMM without solving the gbuffer issue was ugly, and SSR in Ray-MMD requires Reona's Ray-MMD SSR fix to work the way you see there anyway.