18% More Light ON AVERAGE
A quick note: I’m not a trained gemologist. No GIA diploma, no mineralogy degree, and no traditional bench apprenticeship. Just a software engineer who fell down the rabbit hole of faceting machines, geometry, and how light bounces around inside crystals.
Most gem cutting diagrams floating around the internet were drawn by hand or tuned by eye in legacy CAD tools that never solved for real 3D multi-tilt optics. Cut them as written and you leave a massive amount of light, contrast, and fire on the table while leaking photons straight out the pavilion.
ProFacet is built on a completely different idea: even though a .gcs file only stores static depths, ProFacet automatically figures out the true meetpoints from the .gcs file, turns the cut into a living optical blueprint, and lets a GPU optimizer find the best angles while keeping your exact facet pattern, outline, and meetpoints intact. Anyone can try this right now at profacet.com: just drop your .gcs file into the left sidebar and everything is done automatically, with the upgraded .gcs and .fsl files ready to download in seconds. All processing happens 100% locally in your browser on your own GPU, so no design ever leaves your computer during optimization.
Average Improvement Across 2,111 Internet Gem Designs#
To prove what ProFacet's optimizer does to real-world cuts, we ran over 2,100 .gcs gem designs from major internet archives through this exact automatic pipeline. Across 2,111 ray-traced designs, ProFacet delivered 18.4% more light ON AVERAGE without adding or removing a single facet:
| Optical Metric | Average Improvement Across 2,111 Internet Designs |
|---|---|
| Brightness (3D light return across tilt) | +18.4% |
| Uniformity (even light distribution, called Entropy in ProFacet) | +9.5% |
| Contrast (crisp light-dark pattern) | +9.4% |
| Fire (rainbow dispersion) | +9.0% |
| Windowing (see-through light leakage, lower is better) | -8.4% |
Same facet count, same crown and pavilion layout, same outline, just every tier angle individually tuned across 19 viewing tilt angles. Before you spend hours at the bench cutting a diagram from the web, drop your .gcs file into profacet.com and let the optimizer upgrade it automatically in your browser.