This extra video looks at using GIMP instead of Photoshop for Skyboxes
GIMP: https://www.gimp.org/downloads/
Photoshop Video: https://www.youtube.com/watch?v=T_5l9l8FpFs&ab_channel=ARVids
Fantasy Skybox FREE - https://assetstore.unity.com/packages/2d/textures-materials/sky/fantasy-skybox-free-18353
Sources used for this video
Cloud Image - https://unsplash.com/s/photos/cloud
GIMP Cloud Brush Tutorial - https://www.youtube.com/watch?v=meJqGRSawcE&ab_channel=LibreSoftwareEnjoyer
GIMP Gradient Video - https://www.youtube.com/watch?v=_HhGsG5-S54&ab_channel=MufasuCAD
Saving Brushes Reddit - https://www.reddit.com/r/GIMP/comments/z0dnc0/brush_directory_for_gimp_21032_for_windows_newbie/?rdt=58100