Update what's new

dist/preview release/what's new.md

@@ -104,6 +104,7 @@
 
 ### Materials Library
 - Added the `cameraOffset` vector property in the `SkyMaterial` to get an offset according to the horizon ([julien-moreau](https://github.com/julien-moreau))
+- Fixed `GradientMaterial` to consider disableLighting working as emissive ([julien-moreau](https://github.com/julien-moreau))
 
 ## Bug fixes
 - Fixed TransformNode.setDirection (orientation was wrong) ([Deltakosh](https://github.com/deltakosh))