• Add Custom Shapes: Add custom shapes and arrange bones on separate layers
• Add Simple IK: Add a simple IK rig to the active rig.
• Convert To MHX: Convert the active rig to an MHX rig.
• Convert To Rigify: Convert the active rig to Rigify.
• Create Metarig: Do the first part of Rigify conversion, where a metarig is created from the Daz rig.
• Rigify Metarig: Do the second part of Rigify conversion, where the previously created metarig is converted to a Rigify rig.
• Add Mannequins: Create a collection of meshes, which are parented to the armature's bones and don't have armature modifiers. For faster posing.

notes by Alessandro Padovani.

We are often asked in the daz forum which rig is better. There's not "better" rig it depends what you need. Hopefully the notes below will help.

RIGIFY. Rigify is a professional full featured ik rig for original animation in blender. Unfortunately it is not so good to import daz poses and animations because there are some strong differences with the daz rig.

MHX. MHX is more intended as a compromise for people who wants to animate in blender but retain a good compatibility with daz poses and animations. So you can mix blender original animation and daz. As for blender animation MHX is less featured than Rigify.

MHX RUNTIME. Please note that MHX requires a runtime to be installed, so the runtime has to match the diffeomorphic version. If you update diffeomorphic you also have to update MHX. There may be issues if we try to use old figures with a new mhx runtime, in general it is better to use the figure with the mhx version it was created with. Or we can keep a backup of the figure with the daz rig, then generate the mhx rig for a new version.

by Thomas. "The mhx update tool has only been tested with the stable versions, and not very extensively with those either. It might a good idea to stick with the version that the mhx rig was created with. Or save a file with the original genesis rig and generate mhx again with the new version."

https://bitbucket.org/Diffeomorphic/import_daz/issues/1694/

SIMPLE IK. Then even the MHX rig is not perfect with daz poses, though it's quite good. That's why the Simple IK rig is provided that uses exactly the daz rig as base so the match is 100%. This is mainly useful to animate in blender then export to daz with "save pose preset", thus using blender as animation tool for daz studio. The Simple IK rig is also better to export to game engines. But it is more limited in features than MHX or Rigify.

Keep DAZ Rig. In 1.7.1 there's a new feature to keep the daz rig, this way Rigify or MHX are used to drive the original daz rig. This is not required for Simple IK since it already uses the original daz rig.

https://bitbucket.org/Diffeomorphic/import_daz/issues/1528/

IK FIX. You will find various options to fix IK, they are provided because in general IK requires prebended limbs to work fine and the DAZ genesis figures are not good for it. So we have "optimize pose for ik" that is necessary for rigify to work fine with genesis figures. Then we have "improve ik" that is necessary for mhx and simple ik to work fine with genesis figures. These are provided as options because you may import a figure that is already prebended, in this case the IK fixes are not necessary.