This is a paid asset, but now you can download Animation Baking Studio (3D to 2D) Free.
Detail this asset from Unity Store: Original Link
Animation Baking Studio (3D to 2D) v3.2.4 (Latest version)
(Tested with Unity version 2020.3.23f1)
Animation Baking Studio (3D to 2D) v3.2.3
“If possible, please buy the package to support the developer”
Sprite Baking Studio (3D to 2D) You can take pictures of various models in various directions. Output files are sprite sheets and animation clips that can be used for 2D or 2.5D games.
ㅇ Various models are available
└ Legacy and mechanim animation model
└ Particle System model
└ Animated rigid model
└ Stationary model
ㅇ Continuous filming in various directions
ㅇ Various shadows
└ Oval-shaped simple shadow
└ Realistic shadow (Two methods)
└ Only shadow can be baked without model.
ㅇ Creating sprite sheets (pivot info preserved)
ㅇ Creating animation clips
ㅇ Variation and Preview
ㅇ Baking Static Models at Once