+ Bezier surfaces: <a href="http:&#x2F;&#x2F;acko.net&#x2F;blog&#x2F;making-mathbox&#x2F;" rel="nofollow">http:&#x2F;&#x2F;acko.net&#x2F;blog&#x2F;making-mathbox&#x2F;</a><p>Talk: <a href="https:&#x2F;&#x2F;youtu.be&#x2F;Zkx1aKv2z8o?t=15m54s" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;Zkx1aKv2z8o?t=15m54s</a>