Bump node without Height plugged in is now optimized into a complete
no-op like in Cycles to support the old workaround for defaulting a
node group input to normal.
Shader compilation progress was moved to the viewport engine info
display. It is now a shader count instead of a progress percentage.
Sub-Surface Scattering radius socket input is now treated as a mean
radius instead of a scaling factor for the pre-computed SSS kernel
(which still uses the socket default value). Manual patching of
existing scene may be required.
Materials using Shader-To-RGB nodes now never receive Screen Space
Reflections or Sub-Surface Scattering effects even if the BSDFs are
not connected to the Shader-To-RGB nodes.
Displacement bump now also affects Image texture node's box projection