In 2025 i had the fantastic opportunity to create my own Substance Source Signature Collection in collaboration with the Adobe Substance 3D team.
My collection is a series of 10 fully parametric substance files that cover celestial objects and surfaces - from big objects like stars to closeups of the inside of a meteorite. To learn more about the project please read the accompanying article on Behance:
https://www.behance.net/gallery/236981715/Procedural-Planetarium-by-Matthias-Schmidt
This particular substance is based on images of meteorites cut in half. It is the smallest scale substance of my collection with the surface representing only a couple centimeters in diameter. The biggest challenge for me was to make the glass part with all the tiny cracks and irregularities look good and interesting without fancy shader effects.
Links to the assets for this Signature Collection:
https://substance3d.adobe.com/assets/collections/34c84b36cc209845f64b9f664340ed7b0dbef0e2