The glTF 2.0 spec says that these pbrMetallicRoughness material properties should be set as 1.0 by default. In fact, KhronosGroup's official Blender Exporter does not even write down those parameters if they are set as 1.0. However, Godot import them as 0.0. https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#pbrmetallicroughness Fixes: #19613 https://github.com/godotengine/godot/issues/19613 (cherry picked from commit 01b01209a3)
01b01209a3
