You may want to create a rigged and animated character from a game which has no way to export character models. One solution to this is to use 3D Ripper DX and a Biped to quickly rig the character.
Ripping the model
Before capturing the scene, see if it’s possible to get the character into a T-Pose. Some games have command line options for this (such as Skyrim).
Importing the model
1) Open the scene in 3DS Max. Delete everything except the character meshes.
2) Attach all the character meshes together.
3) Use the Transform Toolbox (Edit > Transform Toolbox) to center the character, then rotate as needed so the character is standing upright.
Creating the Biped
1) Under the Create > Systems tab there will be a Biped option. Make the Biped about the same size as the character. Turn on figure mode.
– The “figure mode” button is located in the Motion panel. This is the mode that allows you to alter the biped.
2) Move, Scale and align the Biped to match the character mesh.
– The goal is to have the biped bones in the center of the mesh.
3) Once your Biped is scaled and aligned properly, turn off figure mode.
4) Add a skin modifier to the mesh
5) Under the Skin Parameters, click the “Add” button and select all the biped bones.
As you move the biped bones you may notice some vertices don’t move with it. This is an easy process to fix, but will take some practice to perfect.
1) Select the mesh. Click the “Edit Envelopes” button. Select the Vertices checkbox.
2) Scoll down and open the weight tool (has a wrench icon).
3) You will notice gray lines. Select the one that corresponds to the bone you wish to use.
4) Select the vertices you wish to fix, they will turn into white boxes.
5) In the Weight Tool, press the 1 button.
– When done weighting, you can use BIP files to test the rig.
– Once you are satisfied, you can export to your game of choice.
– Weighting, like all aspects of animation, has many more options to control and refine things. This tutorial is only a start.
Problems and Fixes
1) The skin color or clothing doesn’t look correct.
– Many games use dynamic materials which allows them to easily change the appearance or characters. You will need to manually adjust the material to try and recreate the same effect.
Biped rigging 3DS Max tutorial