Enchanting a trident doesn't make either its inventory icon or the 3D model glow. This has been the case since it was introduced and the shields have since been fixed.
MC-132427
Tridents don't glow when enchanted
Resolved
Duplicate
0
El Has
(Unassigned)
Unconfirmed
enchantment, shield, trident
Minecraft 1.13-pre5, Minecraft 1.13.2, Minecraft 18w44a, Minecraft 19w08b
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