Update README.md

README.md

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 # UnityPCSS
-Nvidia's PCSS soft shadow algorithm implemented in Unity
+Nvidia's PCSS soft shadow algorithm implemented in Unity3D.
 
-Currently only works with "Directional" light sources, as it's primarily an override of the "Screen Space Shadows" shader in the graphics settings, but I'm looking into the possibility of directly overriding the actual "Shadow Library" .cginc.
+# Description
+"PCSS" or "Percentage Closer Soft Shadows" is a shadow sampling algorithm invented by Nvidia in 2005 ([Original Whitepaper](http://developer.download.nvidia.com/shaderlibrary/docs/shadow_PCSS.pdf)). The intent is to simulate a more realistic falloff where the shadows get progressively softer the further the receiver is from the caster.
 
-Any perfomance data would be greatly appreciated, as I only have my workstation to test on ATM, and it's too OP to give me an idea on how it performs on "normal" computers. Specifically the demo scene FPS, blocker and PCF sample count (sliders on the right), and hardware specs would be great, maybe a screenshot of the profiler, but at this point, literally any data would be great haha :)
+This effect is easy to spot in real life, such as when looking at tree shadows:
+![alt text](http://www.pictorem.com/collection/900_455535.jpg "Photo of a real tree shadow on snow")
 
-This asset shall remain forever free (because enough people charge for high quality assets), but if you wish to support me, you can donate to me through PayPal: paypal.me/TheMasonX. NOTE: Please do not donate if you don't want to/can't, I'm merely offering it as an option for those who wish to support me in devoting a lot of time into an asset that I actually have no use for in my current game.
+I thought this photo was really cool, so I did a quick recreation as a test:
+![alt text](https://pbs.twimg.com/media/C9R9LQ3V0AAXqBo.jpg "I think it looks fairly close for like 5 minutes of work haha")
+
+
+# Current Limitations
+Currently only works with "Directional" light sources, as it's primarily an override of the "Screen Space Shadows" shader in the graphics settings, but I'm looking into the possibility of directly overriding the actual "UnityShadowLibrary.cginc" to affect "Spot" and "Point" lights if possible.
+
+# Version Compatibility
+The shadows themselves do work with **BOTH 5.5 and 5.6** (no modifications necessary, it automatically detects and adapts to either version), but as this is a **Unity 5.6 project**, the materials in the demo scene do not import correctly in 5.5. There are only 3 or so materials that need their albedo/metallic/specular textures assigned from the nearby "Textures" folder, so it's not that bad, but if anybody has any ideas to fix this, please let me know! :)
+
+# Future Development
+This asset and any improvements will remain free (both as in beer and speech), but if you wish to support me spending extra time on this, you can donate to me through PayPal: paypal.me/TheMasonX. NOTE: Please do not feel pressured to donate it's just an option if anyone wishes to support me spending more time on this, and less on my game, which I can't even use it for.
+
+I obviously didn't do this to make money though; instead, I'd prefer support in the form of you guys contributing back any fixes/improvements, so that we can all benefit :) I made it Open Source rather than just a free asset because I believe that if we work together, we can create something truly amazing. Thanks for the interest, and I hope you guys get some good use out of it! Let me know if you have any issues or ideas, and I'll respond to pull requests ASAP.