Values
None
Use when you are not using per-instance custom data.
Data8bit
Compress custom_data into 8 bits when passing to shader. This uses less memory and can be faster, but loses precision and range. Floats packed into 8 bits can only represent values between 0 and 1, numbers outside that range will be clamped.
Float
The godot.Color
passed into godot.MultiMesh.setInstanceCustomData
will use 4 floats. Use this for highest precision.