its not an exact solution, and actually the implementation is just very poor. highly optimised versions of this have been around for 20 years or more running wi

its not an exact solution, and actually the implementation is just very poor. highly optimised versions of this have been around for 20 years or more running with /software/ rendering. you can boil the whole thing down to a convolution matrix type trick which a modern gpu will eat for breakfast. i should find some time and do one of these... the quality of 'impressive webgl tech demo' seems to be about 15 years out of date in general...