Images not loading

[Metas]

I downloaded forage for mac. I downloaded the low quality picture set. I tried extracting the pictures into the pics folder. I went into forge and selected import data then chose the pics folder. The result of that is that some lands got their pics copied but none of the other cards did. I tried manually copying the pics folder into Library/caches/forge/pics. That didn't work. I tried just about every directory I could think of. The pics folder just contains a list of JPEG's.
Any help would be much appreciated thank you

[modified]

The images are extremely case sensitive in so far as Lightning Bolt.full.jpg if this part of the file name has any upper case letters or the string before it has any errors with spelling the file won't
load or may cause other errors as you mentioned. I'm using a linux operating system although as I understand this remains a universal Java Forge trait.

If you need also here is a package of images for the latest version.
tinyurl - ho4ejzd