https://www.arnoldrenderer.com/news/arnold-5-2-1/

Release notes.

Round Corners user guide (MtoA).

High-resolution image here. Sorry Emily!

More incredible work by Jacques Defontaien. 

Great selection of scanned models here:

https://vfxlib.com/

http://www.solidangle.com is now www.arnoldrenderer.com

http://www.support.solidangle.com is now www.docs.arnoldrenderer.com