whats new (with formatting)

dist/preview release/what's new.md

@@ -5,20 +5,25 @@
 ## Updates
 
 ### Core Engine
+
 - Add the choice of [forming a closed loop](http://doc.babylonjs.com/how_to/how_to_use_curve3#catmull-rom-spline) to the catamull-rom-spline curve3 ([johnk](https://github.com/babylonjsguide))
 - Add support for specifying the center of rotation to textures ([bghgary](http://www.github.com/bghgary))
 
 ### glTF Loader
-  - Add support for KHR_texture_transform ([bghgary](http://www.github.com/bghgary))
+
+- Add support for KHR_texture_transform ([bghgary](http://www.github.com/bghgary))
 
 ## Bug fixes
 
 ### Core Engine
-  - Fix ```shadowEnabled``` property on lights. Shadows are not visble anymore when disabled ([sebavan](http://www.github.com/sebavan))
+
+- Fix ```shadowEnabled``` property on lights. Shadows are not visble anymore when disabled ([sebavan](http://www.github.com/sebavan))
 
 ### Viewer
-  - Fix Navbar Interaction on Mozilla/Firefox ([SzeyinLee](https://github.com/SzeyinLee))
-  - Fix Animation Slider Interaction on Mozilla/Firefox ([sebavan](http://www.github.com/sebavan))
-  - Fix Animation Slider Clickable area size Cross Plat ([sebavan](http://www.github.com/sebavan))
+
+- Fix Navbar Interaction on Mozilla/Firefox ([SzeyinLee](https://github.com/SzeyinLee))
+- Fix Animation Slider Interaction on Mozilla/Firefox ([sebavan](http://www.github.com/sebavan))
+- Fix Animation Slider Clickable area size Cross Plat ([sebavan](http://www.github.com/sebavan))
+- Ground material didn't take the default main color is no material definition was provided ([RaananW](https://github.com/RaananW))
 
 ## Breaking changes