How small is a pixel? Does it depend on the type of screen or is it a standard size on most screens? Are we approaching the smallest possible pixel size that is physically possible?

It was mentioned in class that these incremental updates make it difficult for parallel processing. Can anybody explain why that is to a graphics newbie like myself?

@freshavocado parallel processing would require us to split up chunks of 'stuff' to process that are independent of each other, which could then be stitched together at the end when all of the threads/separate compute nodes return. In incremental traversal, we are always referencing the previous the previous L_i(x,y) to calculate its neighbors L_i values. This information can't be passed between threads easily, so it makes parallel computation here not efficient.

Wow, thanks for the clear explanation! Yeah, that totally makes sense.