Hi I've been following Petter Zoppi's real-time eye course for games, which can be found on Gumroad. I think the tutorial is a bit old now, and I believe he was using Marmoset 2 or 3. When adding Transparency, he did it by selecting 'Add', which is no longer an option in 4. I followed another tutorial on how to get…
Totally forgot about this thread... >_< In the end, it turned out I hadn't baked the right meshes. This tutorial covered the same workflow and from that I realised what I should've done: :)