When baking a 3D model, opacity often goes missing because the bake tool isn’t set to include the alpha/transparency channel or the source material’s opacity data isn’t properly linked.
Bake tools don’t auto-detect opacity by default—common issues include: - Forgetting to enable "Alpha" in bake settings. - The opacity map not connecting to the material’s transparency input.
To fix it, first check if your bake settings include the alpha channel, then confirm the opacity map is linked to the material’s transparency slot in your 3D software before re-baking.