Ruth and RRe worked together to improve the metal reflections in Raspberry shader. The results are quite impressive, metals now look much more realistic with more accurate speculars.
Here are some screenshots to give you the gist of it :
Raspberry has a public version, the dev previews are exclusive to patrons.
Here’s Ruth’s page where you can find the public version of Raspberry. If you want to support her work, check out her patreon too !