r/gamedev is pretty active, but it's more programmer/one man indie focused. Most people on this forum would probably be posting replies from an artist perspective, which is usually underrepresented there. They do love their free 2D tilesets for unity though.
Replies
https://www.reddit.com/r/3dmodeling
https://www.reddit.com/r/computergraphics
https://www.reddit.com/r/lowpolyTutorial
https://www.reddit.com/r/Maya
https://www.reddit.com/r/3dsmax
https://www.reddit.com/r/Daily3D
https://www.reddit.com/r/low_poly
https://www.reddit.com/r/unrealengine
https://www.reddit.com/r/gamedev