Textures not credited are either 1.14 default textures or originals.
Following textures/models are backported and follow original creator license. 

- Day Sky (only mirrored it for skybased game modes): MathoX
- Ladder 3D model 1.15: https://www.planetminecraft.com/member/epicnecromancer/

QOL Tweaks were all made by the Vanilla Tweaks team

Credits:
Vanilla Tweaks: https://vanillatweaks.net/