materials test scene, used to diagnose numerical instabilities // EV0, no tone mapping, converted to sRGB // 7680x4320, 6572.79ms, i5-12600K 16 threads

scene-3.xml // EV0, no tone mapping, no linear RGB to sRGB conversion // 1280x720, 57.7348ms, 16 threads i5-12600K

scene-box.xml with floating point errors accounted for // EV0, no tone mapping, no linear RGB to sRGB conversion // 2560x1440, 285.837ms 16 threads on i5-12600K

Initial rendering of box with shadows. Floating point errors are wreaking havoc - need to introduce bias/control for numerical errors.