Add screenshot taking guide

Author: vorg

Screenshots.md

@@ -0,0 +1,35 @@
+
+## Taking screenshots
+
+This guide explains how to save screenshots from Unity at resolution of 10k+ pixels.
+
+### 1.
+Download/Save As file
+ [TakeScreenshot.cs](https://raw.githubusercontent.com/variablestudio/var-bartlett-point-cloud/master/unity/PointCloudViz/Assets/Scripts/TakeScreenshot.cs) and drag it to the Project Assets / Scripts.
+
+![](doc/screenshot-01.jpg)
+
+### 2.
+Open Edit menu -> Project Settings -> Quality
+
+![](doc/screenshot-02.jpg)
+
+### 3.
+Disable Anti Aliasing
+
+![](doc/screenshot-03.jpg)
+
+### 4.
+Drag TakeScreenshot script onto the Main Camera. Disable FPSCamera if you have one.
+
+![](doc/screenshot-04.jpg)
+
+### 5.
+Start game by clicking Play button and now at any time you can press `[Space]` to save screenshot.
+
+![](doc/screenshot-05.jpg)
+
+### 6.
+The screenshot should appear in the project folder with with a current time and date.
+
+![](doc/screenshot-06.jpg)