My Facial Rig

[underearth]

hey
Nice work model is looking pretty neat and good expression
can u put some screenGrab for us to see how shapes are blending and your UI stuff.

thanks

sUNNYC>

[giordi]

hei good job , if you can share my information

[creatingJunk]

thanks guys, I'll try to put up some pictures to explain my rig

[creatingJunk]

The face rig is really not very complex, I'll try to explain it as best as I can.

The UI is simple, each controller controls a blendshape's blend weight, through a network of clamps, multipleDivide nodes etc. For example, the smile/frown controller is limited to max Y translation of 1 and min of -1. Max X Translation of 1 and min -1. When Y Translation is 1, the smile blendshape's blend weight is 1, when the controller's Y translation is less than 0, the smile blendshape's blend weight is 0 (off). The inverse is true for the frown blendshape (frown blend weight is at 1 when the controller is at -1 and 0 when the controller is at 0 or more than 0).

http://i1007.photobucket.com/albums/af197/boonyifei/faceUI.jpg

The head's displacement map is made and generated from zbrush.
The first head is the base head, the 2nd and 3rd are blendshapes with the corresponding wrinkles and creases.
http://i1007.photobucket.com/albums/af197/boonyifei/step0.jpg

here's a screencap of the displacement map blending network
http://i1007.photobucket.com/albums/af197/boonyifei/dmap_network.jpg

too complicated and messy to show so I'll try to explain the idea behind it
http://i1007.photobucket.com/albums/af197/boonyifei/step2.jpg

1. mask for brow
2. mask for crowfeet wrinkles
3. mask for sneer
4. result of adding of adding the masks (depending on what blendshape is on, the corresponding mask is included in this process)
5. mask for splitting left and right
6. multiplying 5 with 4 we get mask for only the left side (inverse mask 5 to get the right side)
7. Displacement map from one of the blendshapes.
8. Multiplying the mask with the displacement map
-6. inverse of mask 6.
9. displacement map of the base head. ie no wrinkles
10. multiply -6 with 9 we get a displacement map of the base head with the area with wrinkles blacked out.

http://i1007.photobucket.com/albums/af197/boonyifei/step3.jpg
finally, add the base head displacement map with wrinkle area blacked out and blendshape's displacement map with only wrinkle area and you'll get wrinkle displacement on top of base head's displacement. Apply this to the lowpoly head!

Hope that was helpful!

[Leffler]

Good to hear someone else that still uses the good ol´ blendshapes, there the best way =) Just take alot of time ...

Did you have to create alot of "fix shapes" for this setup if you use that term? Or does your shapes match together nicely without crashing the mesh? Like what happends if you combine a extreme snear with a smile or a frown?

Good job, I like it!
Otto

[phoelix]

nice setup!, it would be interesting if you can show us a video...

in the 10th disp map there is a silhouette in the wrinkles piece , that doesnt affect the result?

[creatingJunk]

thanks guys!

Leffler : Not a whole lot of blendshapes, I just had to create a few master blendshapes and extract the smaller blendshapes from it. .For example, there's a scrunch master blendshape which is a combination of sneer, brow down, brow squeeze, smile, squint, so from that master blendshape, I'll mask away all other parts that are not a smile and extract that as a smile blendshape, a technique explained in Jason Osipia's "Stop Starring" book. This way a sneer and smile will play nicely with each other without crashing the mesh too.

phoelix : thanks man, I don't have a rendered video that I can show (only 1 I used as a test, but that one is old). The silhouette in the 10th displacement map? Do you mean the black spot? Yeah, you'd have to combine that with the 8th displacement map to get the final displacement map, the 11th. What I'm doing basically is replacing that blacked out part of the map (this is the base map with no wrinkles) and replaced it with a blendshape's displacement map (the map with wrinkles). Imagine cutting a hole on a piece of paper, then covering up the hole with another piece of paper.

[Polimeno]

nice setup!, it would be interesting if you can show us a video...


yess, would be cool to see it in action.
could you please post some video/animation/playblast to show the range of expressions ??

[phoelix1]

The silhouette in the 10th displacement map? Do you mean the black spot? Yeah, you'd have to combine that with the 8th displacement map to get the final displacement map, the 11th. What I'm doing basically is replacing that blacked out part of the map (this is the base map with no wrinkles) and replaced it with a blendshape's displacement map (the map with wrinkles). Imagine cutting a hole on a piece of paper, then covering up the hole with another piece of paper.

Sorry... i mean the 11th disp map... there is a black silhouette in the piece of wrinkles...

[Boucha]

Looks pretty good. Just curious, what does "A" stands for in the joystick UI. Keep up the good work.

[creatingJunk]

Polimeno : aiight, I'll try to see what I can whip up, stay tuned!

phoelix1 : oh, you mean that, I think that's just an artifact i get from photoshop, the actual process is done in maya and there's no silhouette there

Boucha : The "A" is the advance control. With that turned on, you can control left and right independently for example, in the smile/frown controller, with advance turned on, you can have the left at frown and right at smile.

[Boucha]

Interesting ! Would love to see this in your demo with animation :thumbsup: !

[archanex]

I'm looking forward to seeing this video also :)

[anoopak]

same here.Would love to see the video of the facial in action

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