Generating "Splat Mesh"?

Hey
I want to make an script that would generate a mesh flattened over geometry. Something like this(Ignore the text):

With correct UV's(Top left of the mesh being the top left of the texture and the bottom right of the mesh being the bottom right of the texture).
I'm going to use this for roads, bullet holes, blood, etc. How can i make a script that can generate something like this?

 

http://blog.wolfire.com/2009/06/how-to-project-decals/ is a pretty good resource. There are also finished assets for this.
https://www.assetstore.unity3d.com/en/#!/content/10608
The old unity soldier demo also had a system for this, if you can find it.

 

Thank you!
I tried to follow the Wolfire blog post, but i'm stuck on how to convert a mesh to projector space. Any ideas?

 

For each affected model, transform each vertex to world space, then transform them to local space of projector. If they have transform components you have both methods and matrices with this functionality.

 

These are usually called "decals", not "splat mesh". There's a free example project from Unity that shows one way of doing it here: https://blogs.unity3d.com/2015/02/06/extending-unity-5-rendering-pipeline-command-buffers/

 

I'm not sure if "Unity Projectors" are still a thing to avoid, since I haven't seen them or messed with them in quite awhile, but it used to be that they were a horrible option for common texture overlays (decals) because of the performance concerns associated with them. Bullet holes and other dynamic instances were completely out of the question. I noticed now though, looking through the manual, that "bullet marks" are listed as a possible use. Has anyone used a projector in more recent (post 5.0) versions, namely after the switch to the current standard shader, and can give any sort of update on performance concerns?

Btw, if you need really simple decals like bullet holes, and the surfaces that they can occur on are guaranteed to be flat, I recommend the Quick Decals 2 asset on the UAS. It won't work like a projector, but it's a simple resource-friendly alternative for flat texture overlays on flat surfaces.