This question might sound stupid to anyone who knows the first thing about lasers and resin, but:
The laser shines through the entire height of the resin, while the salt water goes in from the bottom, pushing the resin up.
Wouldn't the laser cure the resin along the entire length of the beam?

I mean, I've seen the video and it looks like it's only cured on the bottom of the container, but I don't understand the how and why...


Can anyone explain this to a lowly software-programmer?