Transparency, can't add "additive blending"?

GreenFirefly

First time using marmoset and watched tutorials for it. I am adding texture maps for eyes, which are made from two parts. And the outer lens should be transparent. In many tutorials I see people using transparency with "add". (Even in marmoset's own tutorials) I however don't have this option. I only have cutout or dither. Has it been moved somewhere else or am I missing something else?

Using Marmoset Toolbag 4.

EarthQuake

Additive blending is no longer supported in Toolbag. What you'll likely want to use is Refraction or Thin Surface for the outer shell of the eye. You can enable either mode in the Transmission panel in the Material Editor. You may want to select the shell mesh and disable shadow casting on it as well.

GreenFirefly

Thank you for the answer! Especially for mentioning about the shadow casting! Easy thing to miss.