[jvilk]

Here's the only thing I could easily find via Google [0]:

"The basic design right now is that we draw every pixel of every frame, but there's a lot of overdraw when things overlap. This shows up in the moiré demo where there's a lot of overlap. Also we don't have enough information to do subpixel antialiasing. gw had a great idea to solve both of these problems. The prototype he built uses a ray tracer to trace through all of the objects and draw each pixel only once. That should lead to new features like subpixel AA and also more consistent performance."

More context would be appreciated, though!

[0] https://github.com/servo/servo/wiki/Meeting-2016-03-07

[aidenn0]

Also in a previous webrender discussion on hn pcwalton credited the design of the original webrender to gw as well.