upgrade guide (#1866)

visgl · May 29, 2018 · c55e153 · c55e153
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diff --git a/docs/upgrade-guide.md b/docs/upgrade-guide.md
@@ -1,5 +1,18 @@
 # Upgrade Guide
 
+## Upgrading from deck.gl v5.3 to v6.0
+
+#### Pixel sizes
+
+Pixel sizes in line, icon and text layers now match their HTML/SVG counterparts. To achieve the same rendering output as v5, you should halve the following props:
+
+* `ArcLayer.getStrokeWidth`
+* `LineLayer.getStrokeWidth`
+* `IconLayer.getSize` or `IconLayer.sizeScale`
+* `TextLayer.getSize` or `TextLayer.sizeScale`
+* `PointCloudLayer.radiusPixels`
+
+
 ## Upgrading from deck.gl v5.2 to v5.3
 
 ### Viewport classes

diff --git a/docs/whats-new.md b/docs/whats-new.md
@@ -14,6 +14,10 @@ deck.gl layers can now specify additional type information about properties. Whe
 > For layer writers: use of prop types is optional, and deck.gl layers will automatically deduce partial prop type information for any properties that lack type information, as long as a default value is specified in the `defaultProps` object.
 
 
+#### Pixel Sizes
+
+Pixel sizes in line, icon and text layers now match their HTML/SVG counterparts.
+
 ## deck.gl v5.3
 
 Release date: TBD, target May 25, 2018