Edit Readme.md

Author: jnphgs

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 application.windows64
 application.macosx
 
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README.md

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 # GridUnitsSVG
+![maskImages](maskImages.png)
+
+## Introduction
+This is a collection of mask images for procedural generation of grid textures and materials.  
+Mask images are generated as svg file using [Processing](https://processing.org).  
+And a large amount of mask images are converted to png files via [CairoSVG](https://cairosvg.org/).  
+How to convert them is summarized [this repository](https://github.com/jnphgs/BatchSVGtoPNG).
+
+## Dependency
+- [Processing 3.5.3](https://processing.org/)