Png files fail to show in preview (Safari)_

[jonathan (Jonathan Deutsch)]

I'm a little unclear on the original post though; it sounded like some images just weren't displaying, but Hype's automatic optimization will change references in the document so it should all display just fine. Were you referencing this in code in which you expected a .png file but it didn't exist (and instead was a .jpg)?

Anyways, the basic behavior and rationale can be found in this post:

Optimize Image Issue - PNGs converted to JPGs

This is a feature, though I understand how it is unexpected. If a PNG has no transparency and there is a reduction in size via jpeg compression, we will convert the format. Simply put, there were many users bringing in massive PNGs that could be highly compressed, especially for retina devices, causing their site to be slow. Even if the file format is the same, accessing by name isn’t always going to yield expected results with ‘automatically optimize’ turned on; Hype will often generate a @2x …

We found this feature does far more good than harm, but for some workflows you may never want it enabled. If so, there's presently a Terminal command you can issue to permanently disable newly added images from enabling the optimize checkbox:

defaults write com.tumult.Hype2 newResourcesAreSetToAutoResize -bool NO
defaults write com.tumult.Beta.Hype4 newResourcesAreSetToAutoResize -bool NO