Update 1.3.1 — Celaria Steam update #685353

Update 1.3.1 is a smaller patch which makes some experimental changes available in the public build. - floor reflection shader was replaced with a new experimental one. The floor is more reflective with an adjusted specular shine. Reflections have a small blur applied to them to reflect the roughness of the material and to make blocks stand out more from the floor in order to improve visual feedback. - minor adjustement to outline rendering and lighting values. Those changes are experimental and can be adjusted in future patches. (More in-depth information will be shared on the next patch notes with a major release.)