Highly detailed 3d carpet mostly for architectural visualizations. Therefore it's quite heavy, uses Blender's hair particle systems.
Average render times for me was around 5 min, only CPU 10 threads 128 samples. The preview images are raw renders, no post processing was done.
Simple render scene included in .blend file.
Dimensions are: X: 1.65m Y: 1.07m Z: 4.33mm