Creating Textures: Rewrite chapter

en/chapters/creating_textures.md

@@ -6,29 +6,68 @@ root: ../../
 
 ## Introduction
 
-In this chapter we will learn how to create and optimise textures for
-Minetest. We will use techniques relevant for pixel art.
+Being able to create and optimise textures for Minetest is a useful skill
+when developing mods. There are many techniques relevant to working on
+pixel art textures, and understanding these techniques will greatly improve
+the quality of the textures you create for Minetest.
 
-* Resources
-* Editors
-* Common Mistakes
+* [Resources](#resources)
+* [Techniques](#techniques)
+* [Editors](#editors)
 
 ## Resources
 
 * [16×16 Pixel Art Tutorial](http://www.photonstorm.com/art/tutorials-art/16x16-pixel-art-tutorial)
 
-## About MS Paint
+## Techniques
 
-You need to be aware that MS Paint does not support transparency.
-This won't matter if you're making textures for the side of nodes,
-but generally you need transparency for craft items, etc.
+### Using the Pencil
 
-## Editing in GIMP
+The pencil tool is available in most editors. When set to its lowest size,
+it allows you to edit one pixel at a time without changing any other parts
+of the image. By manipulating the pixels one at a time, you create clear
+and sharp textures without unnecessary blurring. It also gives you a high
+level of precision and control.
+
+### Tiling
+
+Textures used for nodes should generally be designed to tile. This means
+when you place multiple nodes with the same texture together, the edges line
+up correctly:
+
+[IMAGE NEEDED - cobblestone that tiles correctly]
+
+If you fail to match the edges correctly, the result is far less pleasing
+to look at:
+
+[IMAGE NEEDED - node that doesn't tile correctly]
+
+### Transparency
+
+Transparency is important when designing textures for special nodes,
+such as glass or water, which players should be able to see through,
+and for craft item textures.
+It's important to remember that not all editors support transparency,
+so make sure you choose an editor which is suitable for the textures
+you wish to create.
+
+## Editors
+
+### MS Paint
+
+MS Paint is a simple editor which can be useful for basic texture
+design; however, it does not support transparency.
+This usually won't matter when making textures for the sides of nodes,
+but if you need transparency in your textures you should choose a
+different editor.
+
+### GIMP
 
 GIMP is commonly used in the Minetest community. It has quite a high
-learning curve as lots of its features are hidden away.
+learning curve because many of its features are not immediately
+obvious.
 
-### Use the pencil tool to edit individual pixels
+When using GIMP, the pencil tool can be selected from the Toolbox:
 
 <figure>
     <img src="{{ page.root }}/static/pixel_art_gimp_pencil.png" alt="Pencil in GIMP">
@@ -37,18 +76,11 @@ learning curve as lots of its features are hidden away.
     </figcaption>
 </figure>
 
-### Set the rubber to hard edge
+It's also advisable to select the Hard edge checkbox for the eraser tool:
 
 <figure>
-    <img src="{{ page.root }}/static/pixel_art_gimp_rubber.png" alt="Rubber in GIMP">
+    <img src="{{ page.root }}/static/pixel_art_gimp_rubber.png" alt="Eraser in GIMP">
     <figcaption>
         Rubber in GIMP
     </figcaption>
 </figure>
-
-## Common Mistakes
-
-### Blurred textures through usage of incorrect tools
-
-For the most part, you want to manipulate pixels on an individual basis.
-The tool for this in most editors is the pencil tool.