Blendshape Problem

[hitman005]

Hey guys, sorry if this has been asked before. I couldn't find it searching.
Anyway, I have a model (who's bound and rigged) and copied his face to make some blendshapes. When I add the blendshape to the original mesh, everything looks fine, but when I turn the blendshape on the face gets ugly, the only way I can describe it is as if the face was put through a grinder!
I'm not sure what I"m doing wrong because I havn't had this problem before.
The models attributes were locked at the time I copied the face, so I unlocked them and made the blendshape and then locked them back but it didn't seem to make any difference.
Any ideas?

Edit: I don't know if it had anything to do with it, but I restarted my computer and it seems to work fine now. Weird....:-s

[hitman005]

bumbs

Well, I have a new problem so instead of starting a new topic I'm just re-entering in this one.

Yes, it's still about them blendshapes. Here's what I got:
The eyebrows of my character is supposed to go down halfway OVER the sunglasses he's wearing. When I made the blendshape, I had a copy of the face, made the adjustments to the topography with a copy of the glasses on the face (so I could see that the eyebrows DID go over them). The face and glasses are 2 seperate polygon pieces btw.
I added the blendshapes to my mesh, everything works fine - UNTIL I turn the head, (rotating it to the left and right, or up or down). If the blendshapes are activated the eyebrows go down but the glasses pop up from beneath them.
Is there a way to fix this?
Do I have to re-do the Blendshapes with the glasses and face combined as one mesh for it to work ...?
Just confused on what to do next. ...

[joojaa]

QUOTE(Hitman005 @ 05/08/08, 12:36 AM) [snapback]285214[/snapback]
Do I have to re-do the Blendshapes with the glasses and face combined as one mesh for it to work ...?
Just confused on what to do next. ...

Yes.

[hitman005]

Ugh, thanks. But I keep encountering more problems. Here's what happens now:

The character is already bound to a skeleton. I select the glasses and the face, and combine the 2 polygons. It puts a "combine polys" (or something) node in the Inputs section, at the top. So I unlock his face and copy it to make the blendshape. Lock it's attributes back again (not the blendshapes).
Make the blendshapes and add them. Everything works.
Until I turn the head and active the blendshape. If the head is turned, the blendshape forces the head back to it's front position.
I have the option set to Front Of Chain in the blendshape box. If I go with the Defaul option, the head moves, until the blendshape is activated, then only the skeleton moves, not the model. I tried to move the blendshape node in the All Input section infront of the skincluster, but it says that the blendshape isn't affecting it or something.
Any ideas..?
I'm using Maya 7 btw.

[hitman005]

Ok, so what else can I do here... I'm really not thrilled by the prospect of re-rigging the whole thing, and then painting the weights again.

Could I detach just the skin for the head, combine the glasses and head as 1 polygon, re-bind the head to the body and have everything work fine?
I tried this but when I try to bind the head to the skeleton again it keeps saying that one of my thumb joints were bind at a different pose and go to Bind Pose to solve this. I did so, and nothing happens...
It's driving me nuts at the moment....
What can I do?!

[crispy]

Turn off: Modify --> Evaluate Nodes --> All

Then dial your (Bound) Skin Envelope slider back down to zero....

Try 'Adding' the blendShape to your existing blendShape node now - should do as expected

Don't forget after doing that to:

Turn Modify --> Evaluate Nodes --> All back ON

Then re-dial your Skin Envelope slider back up to ONE

Also - to reset just one joint, try this command:

dagPose -reset -n "bindPoseName" "jointName";

Chris

[hitman005]

Hi Crispy,

Thanks for your time, and info.

Your first suggestion worked. Now, I can add the blendshapes and turn the head.

Bad news: The blendshapes deform the face (just like in my first post in this topic).

Good news: I used the info of resetting the bindposes you gave me, and reset a couple joints in the hand. This allowed me to re-attach the head to the skeleton again.

Finally, it feels like I'm back on track (for now...!)

Thanks Crispy.