The connected glass textures don't seem to be working at all for me running forge with embeddium, not sure if there's a workaround for 1.20.1 ..I found ReforgiumRenderer which is an indium port for rubidium, but idk if that would work with embeddium, besides it's for 1.19

Connected Glass should work fine with Rubidium and Embeddium.

My bad, the blocks are working, but I'm having the same weird thing happen with the double glass panes as the last reported bug

it's caused by incompatibility with Fuzs Diagonal Windows mod