3 ms·

Looking at your and other comments there might be confusion about definition of unpredictability. Unpredictable for user which is pretty low bar or unpredictabl

Looking at your and other comments there might be confusion about definition of unpredictability. Unpredictable for user which is pretty low bar or unpredictable using best known mathematical techniques and available hardware. Wouldn't the second category be more less CSPRNG? As for first category and examples given. Requires is a weird question. Strongly requires as in it's impossible to make any game or visual effect without it - no. But in case of some design choices you might want some amount of unpredictability. You might want player not to fully predict enemies next move, or you might want a certain graphical effect which varies some parameter randomly within some distribution. Using a very poor pseudorandom generator there might became visible once it gets used in large amounts for placing objects spatially in the form of streaks, shapes or other patterns that wouldn't appear if true random or better quality psrng was used.

Thorrez 6y ago
I think I and andreareina are using the definition from the website. Yes, I think other people are using other definitions, which is causing confusion. > Wouldn't the second category be more less CSPRNG? The website says PCG is "Challenging" to predict and ChaCha20 is "Secure". So I think this means that PCG isn't a CSPRNG, but still is harder to predict than Mersenne Twister. But is this useful at all? I don't know. This thread started by andreareina asking that exact question: "What applications require unpredictability where you wouldn't go full csprng?" People immediately then misunderstood the question because they misunderstood how the word unpredictability is being used. A player not being able to mentally predict enemies and not seeing visible patterns sounds like it might fall more under the website's definition of "Statistical Quality".

Thorrez 6y ago

I think I and andreareina are using the definition from the website. Yes, I think other people are using other definitions, which is causing confusion. > Wouldn't the second category be more less CSPRNG? The website says PCG is "Challenging" to predict and ChaCha20 is "Secure". So I think this means that PCG isn't a CSPRNG, but still is harder to predict than Mersenne Twister. But is this useful at all? I don't know. This thread started by andreareina asking that exact question: "What applications require unpredictability where you wouldn't go full csprng?" People immediately then misunderstood the question because they misunderstood how the word unpredictability is being used. A player not being able to mentally predict enemies and not seeing visible patterns sounds like it might fall more under the website's definition of "Statistical Quality".