LEGO® 71K bricks 13-foot Star Wars Executor Super Star Destroyer by Thomas Benedikt - 16K Render

This brilliant MOC is really a fantastic master piece and a perfect model for a nice stress test with Blender.

But not just the model is impressive. Same is Blender 2.80. There are still some traps killing the performance if you hit the wrong button but overall I am deeply impressed. Because rendering in 16K is usually extreme.

Also dealing with 16K renderings in compositing needs patience. The saved Multilayer OpenEXR alone is over 170 MB. It contains an additinal pass for the glowing emitter parts. The compositing was done in Photoshop after converting the OpenEXR files into PNG. The Photoshop file is 1.3 GB.

But this render took "just" 3 hours 14 minutes 21 seconds on a 16 core Ryzen Threadripper with GTX 1080Ti support. Blender's Cycle is a piece of modern path tracing render technology supporting hybrid rendering. Not an easy task for the development team. As far as I know Cycles is unique actually regarding this feature. And the GTX 1080Ti 11 GB VRAM did a good job on this.