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Re:Show HN: PolyGen App, turn gradients and photos into pret... by nbartlomiej on Thursday January 29, 2015 @01:41PM (#8968016)
The "refresh" button randomises as much as it can, but you can prevent a section from being randomised by "locking" it (clicking on the tiny lock icon).

So you can pick a size, lock it and hit "refresh" as much as you wish. I'm glad that you like the app, cheers!

Re:Show HN: PolyGen App, turn gradients and photos into pret... by ctdonath on Thursday January 29, 2015 @03:49PM (#8968750)
Ah, didn't realize "refresh" was randomizing my prior-chosen settings; thought it should just re-apply those settings to the randomization process.