Reposted by Dan Bruington
"Adjusting animation speed" by @HalbFettKaese
fragcoord.xyz/t/ak2povht
This is a great interactive guide on how to handle changing speeds with linear time in shaders. I was actually about to write something like this!
fragcoord.xyz
Adjusting animation speed — FragCoord.xyz
Common errors and the math behind it by @HalbFettKaese