Neoforge 1.21 21.0.103-beta
Geckolib 4.5.7
https://gist.github.com/iron431/05bb9914a6cf994e82f77e48176a9212

GeoEntities with an ItemArmorGeoLayer or BlockAndItemGeoLayer will throw the Not Building! error when attempting to render the items/armor if the entity is glowing, seemingly due to the buffer while glowing failing the instanceof BufferBuilder check. Other render layers that render custom models do not experience this issue

Is this supposed to have been fixed? it still happens on 4.5.8 https://mclo.gs/ZXVS32O

Is this supposed to have been fixed? it still happens on 4.5.8 https://mclo.gs/ZXVS32O

Does it happen without Embeddium enabled

Got a user to remove embeddium and it still happens https://mclo.gs/yiQ2A7l

This is proving to be rather an annoying bug lol

Got a user to remove embeddium and it still happens https://mclo.gs/yiQ2A7l

@djnifos
Can you try this without any mods other than irons spellbooks & geckolib?

You have a lot of mods that could be interfering

I tried with only downloading Gecko and Iron's and I got the same result: https://mclo.gs/gMNpJ03

https://mclo.gs/eGM9nxm

an hs_err_pid log from this issue

This error will not generate an hs_err_pid, that is an unrelated error

My bad. I saw similar wording and jumped to the conclusion.

I should add, I was leaning towards driver issue because it doesn't seem to effect my machine.

Lol alright
Let's try this once more

this should be fixed once more in 4.6