While IRay remains for final renders, the built-in Path Tracer is now production-ready in 10.1.1. Use it to check multi-layered materials like "car paint with flakes" or "rough concrete with puddles" – the ray-traced shadows capture micro-occlusions that raster viewport misses.
Despite rigorous testing, no software is bug-free. Here are the top user-reported issues in version 10.1.1 and their solutions. Adobe Substance 3D Painter 10.1.1
While major version numbers (like 10.0) often herald groundbreaking features, the update is a "quality of life" and performance-centric patch. However, do not let the minor version number fool you—this update contains critical changes for professional pipelines. While IRay remains for final renders, the built-in