Tech-Artists.org
Simply the best resource online for technical artists (and artists desiring to become more technical). Although the site's wiki and forums are top notch, Tech-Artists.org's secret sauce is its stellar community.
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Technical Artist Video Interviews from GDC 2011's TA Boot Camp
The 2011 TA Boot Camp at GDC was absolutely incredible. If you missed out on the event itself, these video interviews of the program's speakers and various attendees might just be the next best thing.
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"Technical Art Guidelines" by Eric Chadwick
A bit fuzzy on all this technical art hubbub? Eric Chadwick's "Technical Art Guidelines" document provides a concise overview of the field as well as some valuable information on the various specialized roles available to TAs.
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CG Talk
CG Society is a heavy-hitter in the industry for several reasons. The society's legendary forums may be chief among them. You'll find an answer within CG Talk's vast library of threads to all but the most obscure of questions.
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