Weidz_ Forget use pure Path Tracing until developer make some improvements. Suggest two steps: 1. Use PT with denoiser 2. Start with something simple at the beginning, here exported to obj models: First you must play with lights and settings in basic scenes. Two Hints: do not use any environment lights like HDRi or Physical Sky. Only Area Lights in Windows. Always train and setup light in override mode (white color) after that do surfacing. DXR is not ready yet for GI environmental system.