Notice
I believe that this bug is caused by projectiles not being fully updated to the new scale values.
If they properly used the ground scale but then used the old scale values it would cause them to be smaller as they are appearing now.
All projectiles derived from item models (snowballs, potions, eggs, ender pearls/eyes, splash potions, and fireworks) don't match the size of their "ground" model display setting, they are linked to it but are visibly shrunken down (it may just be me, but bigger and smaller ground displays seem to have a bigger difference).
The attached debug pack includes an oversized snowball that shows how much smaller the "thrown" version is compared to the "ground" version.
Linked issues
is duplicated by 5
MC-83225
Ender pearls are smaller than normal in new snapshot
Resolved
MC-84177
Ender Pearls are smaller than normal
Resolved
MC-85443
Enderpearl's are extremely small when thrown!
Resolved
MC-85974
when you throw item's' they are smaller then in 1.8
Resolved
MC-91319
Firework rockets render too small
Resolved
Attachments
Comments 7
The debug pack is actually for multiple issues, the fire charge model isn't used (MC-85128) and the arrow has Z-fighting on it because backface culling is not enabled in 3rd person (MC-85133, plus arrow projectiles have a fixed model): so neither of those actually use their item models for their projectiles (although fire charges should).
The snowball should show the issue more easily than default, but I'm assuming that since others have seen it as well there is a noticeable difference as well.... also 1.8 (anything before 15w32) was unaffected, so it seems like a single change to the model format with general particle inheritance/display code that could easily be reverted/fixed. Well, should be as easy as having the projectiles using the exact same size as their ground display and not shrinking it for whatever reason.
Enderpeals?