Is it possible to change the transparency(opacity) of main brain surface?

[iPsych]

In the mriview.js and mriview_surface.js of webGL viewer, Is there any variable can be change the opacity of main brain surface?
The transparency menu of UI only seems to change the data overlaid on the surface.

[marklescroart]

Very belatedly: Unfortunately, no. If you mess with things in JavaScript, you may be able to get an effect like this, but IIRC the issue is that calcluating depth - distance from camera - for all elements of the scene that are un-occluded by making the base mesh transparent is a big pain in the butt to do correctly. If James Gao didn't want to touch it, I don't think any of the rest of us do...