animagic (3/31/2020)

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What I do is this:

1. Download the basic Mixamo character in T-pose: X bot for woman and Y bot for man. (So this depends on what your target character will be (man or woman). This may not be necessary to have both, but that is what I do. )
I chose X-bot as an example. 



2. Import into 3DXchange. Accept the default settings. The Mixamo character will be recognized automatically.



3. Click Yes and also click Yes at the next prompt:



4. You will now have the X-bot in 3DXchange. You will use it as target for the MIxamo motions you will import.



5. In Mixamo apply the Ascending Stairs motion to the character you just exported (X-bot in my case).

6. Download the motion only as FBX; make sure Without Skin is selected.



7. Back in 3DXchange you will now import the just downloaded motion, as follows:



Select Import, which will open the file browser, where you can select the exported motion (Ascending Stairs in this case). At the prompt select the default settings.

NOTE: It is best to export at 30 fps from Mixamo and import at 12 fps for most motions.

8. The motion will be added to the Motion Library:



9. With the motion selected, click Add to Perform. The motion will be added to the Perform Editor list.

10. Now the delete the T-pose motions from the Motion Library, as we are only interested in the Ascending Stairs motion.

11. You can repeat Steps 6 through 9 to add more motions to the Perform list.

12 When done, select File => Export (Ctrl+E). You will get a dialog:



Make sure nothing is selected under Geometry Settings.
Under Animation Settings, the motion(s) to be exported will be listed. You can keep the default file destination or choose your own. Then click OK. 

Rampa (3/31/2020)

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Sorry. That was me thinking faster than I type. I did mean scaling, but hopefully we do not need to do that at all.

Lets try and consolidate to the challenge thread for further discussion, as I think it will be seen by more people.

animagic (3/31/2020)

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I did come across stair ascending and descending problems. What I have done in past is not to show the feet, so you work with the camera to hide imperfections. The camera is really your friend if things are not perfect, as they often are.

In my example, I imported the Ascend motion. I then used it in iClone and it worked pretty good. It is a short motion and what you need to do is copy the clip, paste it, and right-click select Align Root for the copy. That way, the character will continue to move up. Repeat this until you have enough to move up the stairs. To make the movement fit with the stairs I adjusted the height of the stairs as that is easier than adjusting the motion (I didn't try that).