Flowmap Generator is a tool for creating flowmaps for use in shaders using a fluid simulation. Flowmaps can be difficult to create, especially on a large scale. Several tools exist for hand painting the velocity vectors, but this can be time consuming and if the geometry changes it is necessary to repaint the flowmap. Flowmap Generator lets you set up a simulation that can be easily edited and resimulated when needed.
Right now it exists as a plugin for Unity but I do have plans for making a stand alone version, which would also include all features that normally require Unity Pro.
Features:
-Control the simulation using fields placed in your scene, such as directional, vortex, and calm.
-Calculate foam accumulation based on the velocity of the fluid in the simulation.
-Dynamically updating flowmaps let your flowmap react to changes in the scene. Add and remove fluid, change the scene geometry and move fields around.
-Render heightmaps from your scene so your geometry will be used in the fluid simulation (Unity Pro only).
-Import textures as heightmaps, including support for 16bit .raw textures.
-Support for simulation fluid flowing on surface, which can also be used for other types of flowing substances such as snow and sand.
-GPU accelerated (Unity Pro only) and multithreaded simulations.
Several example flowmap shaders are included and many more are available on the Asset Store. I’ve included a quickstart guide to get you up and running fast as well as a full reference describing all the parameters. Works with Unity 3.5.7 or higher and tested on Unity 4.