I have imported a character made in MakeHuman into Blender , (without any skeleton ) [this is the mesh to which I want to attach a rig.]. I imported another character from Unreal Engine 4 , (it has a skeleton) . Now , I want to take this skeleton and attach it to the mesh from MakeHuman ; How do I go about doing that ?
Here’s an overview:
Move around the bones from the UE4 skeleton to match the MH mesh.
Parent the MH mesh to the armature (I always select “With empty groups” so I can weight paint myself).
Either clean up or create the weight mapping.
Add IK/FK (if needed).
Check/re-check.
It would be much easier to re-export the MakeHuman model with a Rigify armature before you import it into blender. Make sure you enable the Rigify add-on in User Prefs before you import the new model to Blender. This process will take only minutes to add the Rigify armature in MakeHuman. BTW this will also give you a darn good weight paint of mesh to armature!
Otherwise you are in for a great deal of work as @Safetyman has already said.