how can i add the expression on a mesh avatar................

[soptina]

skape keys,vertex groups even a new skeleton of the head...i have try a lot but did not have a way to add the expression on a mesh avatar......any one have some idea??

 

by the way,made three or more head is a good way,but seems very strange when some one press ctrl + alt + t.............

 

 

[Chosen Few]

Multiple heads is really your only option, at this point.  SL does not support morph targets (shape keys) or custom skeletons. 

I wouldn't be worried about what happens when people turn on Highlight Transparency (ctrl-alt-T).  It doesn't look "strange".  It looks like what every model that has transparent parts looks like.  The only reason people turn that feature on is when they want to see what's going on under the hood with a model, transparency-wise.  Nobody has it on permanently, at least no one in their right mind.

What you should be worried about is lag.  Added transparency means added render passes, which tranlsates to lower frame rates in the viewer.  If the model has a high poly count, then the problem only gets amplified.  Ask yourself if it's really worth sacrificing performance, just to give a character model a few expressions.  If you firmly believe it is, then go for it.  But when in doubt, it's generally better to err on the side of performance, especially when you consider that you are not the only one who will be affected by it.

[Kensuke Leviathan]

As chosen said expresses can only be added currently using alpha masked portions, how ever if your model is broken down properly it can be used with minimal performance impact.

https://marketplace.secondlife.com/p/Orange-Nova-Bifrost-Bunny-Beige/5051603

This avatar uses alphed sections for the jaw(just the expressions, talking is via bone movement) eye lids and finger positions, each of those sections is a seperate object with up to 8 faces used for different poses.  Transfer attributes in maya (or other modifier equivalant) can be used to maintain proper normal angles and remove the appearance of object seams on most models.

So yes it is possible, it just takes a lot of work to pull off correctly.

[soptina]

thank you very very much: )