What is the Difference between ‘TextBufferGeometry’ and ‘TextGeometry’.
Also, need help in adding text geometry mesh to a cube geometry mesh, so that it behaves like a single entity.(text written over a box)
Any solution with out ‘group’ or ‘object3D’ would help.
Would adding a mesh to another mesh like in mesh1.add(mesh2) solve the above issue?
Any response is appreciated 
TextBufferGeometry is based on BufferGeometry, TextGeometry is based on Geometry. You can read more about the differences between both types of geometry representation in the documentation:
https://threejs.org/docs/#api/core/BufferGeometry
https://threejs.org/docs/#api/core/Geometry
Why is using a group a problem for you? This would be an ideal solution. Adding a mesh to another mesh works of course too.
Thanks for the reply, but If i use group i am facing a problem with drag controls!