Question: How to Smooth vertex weights (armature)

I’m using the weight paint tools but not getting the desired result - blend brush in particular. for verts assigned to two different bones, the blend brush seems to pinch verts together instead of smoothing them gradually.

There doesn’t seem to be a native ‘smooth’ function in blender for weight paint mode like the ‘smooth vertex’ button in the t-panel when in edit mode.

Is there a general smoothing function for vertices assigned to bones? - maybe an addon?

Well I think that ‘assign automatic from bones’ (‘weights’ menu during weight paint mode) is essentially what I was looking for. Its interesting to use that when the rig is posed, the the bone influences are different. anyway, its solved the problem…