Changes in version 3.4

The following changes were made in version 3.4 of the shaders. Please note that this list may be incomplete:

Glossy reflection and glossy refraction shaders have been added to the base shaders. These often give better results than the glossy shaders in the physics shader library.
An alternative bump mapping shader has been added to the base shaders. This shader is often easier to integrate into shader graphs.
An alternative texture lookup shader has been added to the base shader, which uses a simpler scheme to select texture coordinates.
A blackbody radiator has been added to the base shaders.