The Furnace Test, does Blender 4.0 pass?

In this video, I show some subtle but quite significant improvements to materials and shading in Cycles in Blender 4.0 by running what’s called The Furnace Test. This is a test to determine if a renderer is properly handling energy conservation and preservation. Passing the Furnace Test is a really good thing. As part of this I discuss the difference between the shading algorithm GGX and Multiscatter GGX, and improvement to it in 4.0. 00:00 Introduction 01:10 Furnace Test, setup in 3.6 03:45 Furnace Test in Blender 3.6, specular diffuse 05:25 Adding Clearcoat 05:52 Adding Sheen 06:58 Energy preservation, GGX/Multiscatter GGX 10:00 Energy preservation and transparency 12:13 Furnace Test in Blender 4.0 16:25 Comparison Example #1 17:05 Comparison Example #2 17:43 Comparison Example #3 19:00 Comparison Example #4 #ggx #multiscatterggx #blender4 #blendertutorial #energyconservation