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Unity 5.x Shaders and Effects Cookbook by Kenneth Lammers, Alan Zucconi

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Adding properties to a shader

Properties of a shader are very important for the shader pipeline as they are the method that you use to let the artist or user of the shader assign textures and tweak your shader values. Properties allow you to expose GUI elements in a material's Inspector tab without you having to use a separate editor, which provides visual ways to tweak a shader.

With your shader opened in MonoDevelop, look at the block of lines 2 through 7. This is called the Properties block. Currently, it will have one property in it called _MainTex. If you look at your material that has this shader applied to it, you will notice that there is one texture GUI element in the Inspector tab. These lines of code in our shader are creating this GUI ...

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