Draw Smooth color and export

[miarmy]

Hi....i want have a very very smoothly color on the mesh or faces...
Lock!
http://s9.picofile.com/file/8324558068/eeeeeee2.png

Vertex color Not very soft and clean...and when it is exported as texture map, it's seams fail...

https://forums.autodesk.com/t5/maya-shading-lighting-and/exporting-vertex-colors-as-textures-with-expanded-filled-seams/td-p/7581144