07-23-2019, 08:24 AM
"differences are now explained" 
@rich2005: boy, did I made a big mistake by thinking 8bpc (not knowing what bpc was, now I understand) is equal to 8bit png. That change (automatic mode) was the solution. Thank you very, very much to take the time to help me. I'm so happy...
I was aware of the plug-in but hesitated to use it because it is so old, and I have no problems doing it by hand.
@Ofnuts: It's a long way back that I read about webp but than there were no broad support, I sure will take a look, actually I already start experimenting after I read your post.
For the ones that searched for a solution for photoshop - gimp "save for web" 8bit png:
- scale down image: image, scale image
- convert it to image mode: image, mode, indexed (it that's not allowed, first change from 16 bits to 8 bits by "image, precision, 8 bits")
- export to png: file, export as, (change extension to png), export, automatic pixelformat, compression level 9 (that doesn't hurt the image quality)
@rich2005: boy, did I made a big mistake by thinking 8bpc (not knowing what bpc was, now I understand) is equal to 8bit png. That change (automatic mode) was the solution. Thank you very, very much to take the time to help me. I'm so happy...
I was aware of the plug-in but hesitated to use it because it is so old, and I have no problems doing it by hand.
@Ofnuts: It's a long way back that I read about webp but than there were no broad support, I sure will take a look, actually I already start experimenting after I read your post.
For the ones that searched for a solution for photoshop - gimp "save for web" 8bit png:
- scale down image: image, scale image
- convert it to image mode: image, mode, indexed (it that's not allowed, first change from 16 bits to 8 bits by "image, precision, 8 bits")
- export to png: file, export as, (change extension to png), export, automatic pixelformat, compression level 9 (that doesn't hurt the image quality)