Update README.md

Author: cre8ivepark

Assets/HoloToolkit/UI/README.md

@@ -12,6 +12,8 @@ Materials used in prefabs
 
 Material for 3DTextPrefab with occlusion support. Requires 3DTextShader.shader
 
+![Default Font material vs 3DTextSegoeUI material](https://github.com/cre8ivepark/HoloToolkit-Unity/blob/master/External/ReadMeImages/TextPrefabInstructions06.png)
+
 ### [Prefabs](Prefabs)
 
 Common useful UI prefabs 
@@ -25,11 +27,19 @@ Common useful UI prefabs
 UI Text Mesh prefab with optimized scaling factor at 2-meter distance. (Please read the instructions below)
 
 **IMPORTANT**: To use Text prefabs, please make sure to import SegoeUI.TTF font file from your system font folder (C:\Windows\Fonts\)  
+![Importing Segoe UI font file](https://github.com/cre8ivepark/HoloToolkit-Unity/blob/master/External/ReadMeImages/TextPrefabInstructions01.png)
 
 1. Assign font texture to 3DTextSegoeUI.mat material. 
-2. On 3DTextSegoeUI.mat material, select the shader Custom/3DTextShader.shader This material will make text object occluded by the object in front of them.
+![Assigning font texture](https://github.com/cre8ivepark/HoloToolkit-Unity/blob/master/External/ReadMeImages/TextPrefabInstructions02.png)
+
+2. On 3DTextSegoeUI.mat material, select the shader Custom/3DTextShader.shader. This material will make text object occluded by the object in front of them.
+![Assigning shader](https://github.com/cre8ivepark/HoloToolkit-Unity/blob/master/External/ReadMeImages/TextPrefabInstructions03.png)
+
 3. Assign Segoe UI font and 3DTextSegoeUI material to the text components in the prefabs.
+![Assigning font file and material](https://github.com/cre8ivepark/HoloToolkit-Unity/blob/master/External/ReadMeImages/TextPrefabInstructions04.png)
+
 4. Follow the same steps for the sample text layout prefabs in HoloToolkit-Examples\Text
+![Sample layout prefabs](https://github.com/cre8ivepark/HoloToolkit-Unity/blob/master/External/ReadMeImages/TextPrefabInstructions05.png)
 
 **Working with Fonts in Unity**
 
@@ -49,6 +59,7 @@ When adding a UI or canvas based Text element to a scene, the size disparity is
 
 **Disclaimer**: The default value of any font may be effected by the texture size of that font or how the font was imported into Unity. These tests were performed based on the default Arial font in Unity, as well as one other imported font.
 
+![Font size with scaling factors](https://github.com/cre8ivepark/HoloToolkit-Unity/blob/master/External/ReadMeImages/TextPrefabInstructions07.png)
 
 ### [Scripts](Scripts)