Not sure what this bug is caused by, it seems to only happen with shotgun ammo that doesn't have a unique muzzle flash (Like Dragons Breath). I'm guessing the muzzle flash is either missing or the game just cant find it. This issue only occurs with shotgun muzzle flashes, every other weapon type is fine.

This usually happens when the meshes are missing. When I wear an armor or helmet with missing meshes, it appears that I have a huge red triangle with a white exclamation mark on my head. Do you have a mod active that might modify the muzzle flashes of weapons?

EDIT: adarkfable is right, the textures have nothing to do with the problem. Thanks for the correction!

I shouldn't have any mods that alter the muzzle flashes, I wish I could copy my mod list from NMM somehow.

Undeadsewer wrote:

This usually happens when the textures are missing. When I wear an armor or helmet with missing textures, it appears that I have a huge red triangle with a white exclamation mark on my head. Do you have a mod active that might modify the muzzle flashes of weapons?

this incorrect, it is messing meshes that causes this red Exclamation point.

Skyline wrote:

I shouldn't have any mods that alter the muzzle flashes, I wish I could copy my mod list from NMM somehow.

Do you have FOOK installed? if so try disabling that, dunno if it'll work but still.

No, FOOK isn't installed. I'll try disabling a few mods I downloaded recently and see if that helps.

Ok, that seems to have fixed the issue. Its a shame though, really liked those weapon mods.

Might sound silly, but did you deactivate and activate ArchiveInvalidation after installing the mod? I know i sometimes forget to do that and get red triangles aswell.

There are a lot of reasons to cause this issue. But recently my last missing meshes issues was wrong folder name.

Any word or even just a little punctuation mark , that different from what it/ they should be will lead to this issue. So, check your muzzle flash file both folder and file name; if they are correct, open up GECK and comparing them with file paths in plug in( esp) file.

I hope this would help you.

Isolate which weapon is doing it, which mod provides that weapon, and go from there.  Its probably either the projectile mesh that is missing, or the shell casing.  Though much less likely, it could also be a custom muzzle flash that is missing.

What you wanna do is try to Validate Game CACHE