Not sure I'm the right category here. (Please move post if not).
But I'd be happy to have Blender in the list of available packages.
I have successfully compiled Blender on a Raspberry Pi 2 using the Blender-git PKGBUILD from Aur.
But I'm pretty sure it should also compile fine for the Blender package in Community.
Although Blender might have not been buildable in the past, it's not the case today. See this issue.
Let me know if you need more infoc, but I'm sure this would help quite a lot of people and not just me.
Have a nice day.