Grass was renamed in 1.20.3 or 1.20.4 to "short grass", which broke the textures. This update to part 1 of the resource pack fixes it.
Here are 2 versions.
version 026b does not replace the 3d grass model, use this if you use this pack over another pack with a fancier grass model that you like.
version 026 LOWERS the grass model so that it doesn't appear to float over the 3D POM grass blades anymore, but it's just a cross model.
If anyone wants fancier grass models, let me know, so far I've tried to not increase polygon count to save performance, but i can whip up a few optional variants.
here are the other parts: https://www.patreon.com/posts/heres-resource-95607215?utm_medium=clipboard_copy&utm_source=copyLink&utm_campaign=postshare_creator&utm_content=join_link
Have fun and let me know if anything else broke, i didn't see anything but haven't played much.