Splat Mix Shader
These surface shaders populate an area with overlay decals, ideal for ground cover and other applications. Multiple layers are interleaved and rendered in a single pass and contain up to four layers.
The decals are randomly placed, scaled and tinted to your set requirements.
Stencils can be used to define where layers are placed and there is also a developer mode to help find and place the stencil image.
Avaliable on the Unity Asset Store. Click link below
See attached .pdf for full details
This image uses two planes. The back plane uses a 2X2 atlas image of blood decals randomly placed. The top plane also uses a 2X2 atlas image that contains 4 different single flower heads. Each layer contains a different flower head and in a single pass the shader interleaves these layers.
This images shows the flower 2X2 atlas placed on the ground. A stencil is used to only display the flowers through the while parts of the black and white stencil.
A 2X2 atlas of leaves are interleaved on a stencil to give the illlusion of fallen leaves around the base of the tree.