Assets [WIP] Paint Splattering Shader

I've always loved the paint effect from portal 2 and wished that it could be used in Unity so I did so. Here's a screenshot of the portal 2 gels for reference:

Notice the really nice splattery edge. So I've implemented most of this in Unity (from scratch of course) and I've even added a few improvements (along with the fact that my version using a PBR lighting model).
Here is what my shader is looking like at the moment:

The shader is designed to be extremely customisable, almost everything about the shader can be customised, from the textures of the ground to the way the paint splatters on the ground. Here is a view of the current shader properties:


As you can see, there is a lot of potential for customisation. Defining where paint is on the object is very simple, all that is needed is a simple to make (and modify in real time) splat map which can be of a very low resolution as the shader automatically makes the edges splattery and well defined. Here is what the splat map looks like by itself without the shader:

Finally, I'll leave you with a couple more screenshots and I'll open myself up to any questions or suggestions you might have.

 

Like the look. How good is it on mobile?

 

It should run absolutely fine, though I'm still working on getting the render texture implementation optimized. Otherwise the shader itself should run absolutely fine on mobile.

 

Looks neat. Going to watch this thread!

 

Looks pretty authentic!

 

Hi, just a quick update, I've been working hard and I've got the real time painting system to work:

You'll notice that you can paint on any surface no matter the position and angle of the object (whether it be the same or a different material). The splatmap is now stored in 3 channels (red, green and blue), for each of the dimensions you can paint in (x, y and z, it sounds weird but trust me it works). As you can see, it runs really fast and that even when painting, there is no performance impact.

 

Awesome!

 

So when is it done like to paint with it. Btw good job!

 

Sad news, due to a major bug in the directx shader compiler I'm stumped and I don't know how to continue the project as it breaks a core feature of the shader (which hint hint might be getting rebranded soon if I can fix it). This has been super frustrating for me and even after talking with some smart people I know who have years of experience in programming, I can't fix it. If I am to continue this project I need your help to solve this problem, share this forum post which explains the problem in detail:
https://forum.unity.com/threads/shader-compiler-missing-a-texture-sampler.538883/