Exporting as PNG-8, rather than PNG-24?
I am used to using Adobe Photoshop and Adobe Illustrator, which allow me to choose between exporting as PNG-8 and PNG-24.
For the types of illustrations I create, it is usually better for me to save as PNG-8. The files look exactly the same to the eye, but the PNG-8 filesize is usually about 50% that of PNG-24. Which means they load faster on my website.
My question is: is there a way for me to choose to output as PNG-8 in Clip Studio Paint?
I don't think there is a way to export as PNG-8. I've never seen a dialog box with that sort of option available (file export options are on the sparse side).
Is there a channel I can suggest that (and other requests) through to Smith Micro/CELSYS?
Seems like it would be a useful feature to have, and would be relatively easy to implement.
The number 8 or 24 refers to the number of bits per pixel. If you are not seeing any difference in quality I assume you are are using grayscale.... as with color there would be a world of difference. When you save to PNG in clipstudio a page pops up with various save settings ... in the middle it will say "expression Color - RGB Color" if you change that setting to Gray your PNG filesize is only one third of the size... ( which exactly figures with the difference between 8 and 24. I went back to my color image and posterized it down to just a few discrete colors. then when creating the PNG I changed that same setting this time to "auto detect appropriate color depth" instead of RGB Color and this time I get a color image that was only 8% of the size of the full 24 bit color version. It looks to me like you get the result that you are asking for by using that setting.
Thanks for alerting me to that 'Gray' expression color option. I had not noticed that option before, but it seems to do what I wanted. i.e. drop down to 8-bit.
Thanks for also alterting me to the 'Auto detect appropriate color depth' option, which will be useful for non-greyscale images.