Just an image of shaders, unrelated to this tutorial

Introduction to shaders

A fantastic 5-part written tutorial series by Alan Zucconi about shaders in Unity. For developers with little to no knowledge about shaders.

The tutorial series is available on Alan's blog. Direct links below.

Part 1 - Introduction:
http://www.alanzucconi.com/2015/06/10/a-gentle-introduction-to-shaders-in-unity3d

Part 2 - Surface shaders:
http://www.alanzucconi.com/2015/06/17/surface-shaders-in-unity3d

Part 3 - Physically Based Rendering and lighting models:
http://www.alanzucconi.com/2015/06/24/physically-based-rendering

Part 4 - Vertex and fragment shaders:
http://www.alanzucconi.com/2015/07/01/vertex-and-fragment-shaders-in-unity3d

Part 5 - Screen shaders and image effects:
http://www.alanzucconi.com/2015/07/08/screen-shaders-and-postprocessing-effects-in-unity3d

Note: To download the additional resources for this tutorial series you need to support Alan on Patreon.