Just wanted to post a few free things that I have come across in my travels
1) Free HDRI Timelapse file from Evermotion: https://hdrmaps.com/free-hdri-sky-timelapse/. A 300 frame timelapse of a rolling sky. Be warned...as with all things Evermotion, the file size is pretty big. Over 17 Gb.
2) A pretty good library of high resolution leaves with associated maps: http://www.treesdesigner.com/materials-library/
3) Good site of Blender models (mostly sci fi...which is always a plus): https://www.blendswap.com/profile/1915/blends
4) As I also have a love for hard surface modeling techniques: https://www.youtube.com/channel/UCyowChgs-7b38q2Bi0cKXOA/videos
Dave
wish the release notes and Service Pack update release notes would have alot more detail. instead of something vague like "update to calibration tag", say what the fixed,added,improved. what was the problem.. in 2-3 lines