Operating system: Windows 10 Pro 64-bit
Graphics card: NVIDIA GeForce RTX 2080 Ti
Tested: Blender 2.81 Alpha, September 18, 14:29:45 - b962aca8003d
Short description of error
Vertex Paint ➔ Paint menu ➔ Smooth Vertex Colors tool does not smooth other than direct loop neighbors.
Exact steps for others to reproduce the error
- Divide the default cube a few times (apply if subdivision is done with modifier).
- Enter Vertex Paint mode.
- Paint an area with black.
- Apply Paint menu ➔ Smooth Vertex Colors.
- The vertex paint is not smoothed other than direct loop neighbors.