How is open head of Commander Data done?
Data has his head open several times, for example here:
Given the time of creation of Star Trek - Next Generation series, I don't assume this would be done with CGI, also his head doesn't seem to be thicker due to the second "layer". There are also several occasions, where is Data moving and speaking with his head open, so I would also exclude possibility, that opened head is a replica.
So, I naturally wonder, how is this made?
Thank you, live long and prosper.
Best Answer
The "appliance" (which you could have bought at auction for $2000) was glued directly onto the actor's head and blended in with makeup. The outer edges of the 'brain' appear to be sprayed a slightly darker colour to give a false impression of greater depth and shadow.
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TNG Data's head saves the day (Disaster)
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Images: Tim Douglas, Lum3n, SHVETS production, Tatiana Syrikova