Quote Originally Posted by Ascension View Post
The main thing about the bit depth is that PS can't even run most of the filters in anything higher than 8-bit...too much math to compute I guess. I only use 100 ppi for making my brushes, but for everything else it's 300.
Computers and Filters 101 ;-)
in 8 bit mode, a single color pixel with RGBA or CMYK is represented by a 32-bit integer, 8 bits for each color. Using 16-bit color, you need a 64-bit integer. So, filters needs to need to be written for 64-bit math (which exists and is pretty fast) on 64 bit compatible processors, and much slower on CPUs where 64 bit math has to be done using 32 bit code instead of 64bit instructions.

Most vector instructions works with 128 bit data, so all vector code has to be redesigned as well, to only process half as much data at the same time. So you are right, filters needs to be rewritten.

cheers,

// Totte