Drawing paper shadow effects

I'm developing a sub-library to produce "paper shadow" effects easily. In other words, this code intends to create that kind of shadow that paper sheets usually have.

When in production stage, that software will be able to design several paper shadow styles, so it could be used to make images look to be printed on paper or to be in 3D perspective, among other possible uses.

The final presentation still needs some refinements, so the shadows can look even more realistic, but the main Math calculations are made using Maccala drawing library and are almost complete.

Below you can see a shadow effect example created in a few seconds by using my new shadow software that soon will help to create new outstanding photo effects for Picture to People project.

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