I see, thanks. But there is a link between graphics and hash functions, e.g. (First sentence of abstract of linked paper[1])
> In many graphics applications, a deterministic random hash provides the best source of random numbers.
So, why do people need cheap random numbers in graphics? Is that to create some sort of fuzz/texture/visual effect? Or is it to implement stochastic animations? (I know nothing about graphics)
Graphics uses a lot of Monte-Carlo integration, for which you need (pseudo) random numbers. You want your random numbers to be fast to generate, and have completely uniform so as not to introduce bias in the result.
> In many graphics applications, a deterministic random hash provides the best source of random numbers.
So, why do people need cheap random numbers in graphics? Is that to create some sort of fuzz/texture/visual effect? Or is it to implement stochastic animations? (I know nothing about graphics)
[1] http://jcgt.org/published/0009/03/02/