SO is it CC0 (public domain)?
If yes, you should add the license into metadata for the asset packs:
"Edit asset pack->Metadata->Release Info->License for assets" It will increase the size of audience that will be able to find your art
Viewing post in Animated pixel campfire (FREE) comments
Ok... I will explain my concerns:
1. First my comment was about CC0 but after your reply I saw CC-BY4 in metadata. After your second reply it looks more like CC0 but in question was CC-BY4 which is different from CC0 anyway...
2. After I left many such comments about metadata I found out that many people doesn't really understand licenses for example the fact that any user can redistribute in most CC licenses but answer "yes it is <license name>" because doesn't really understand the license