Paint flow map (drives anisotropy for specular reflections).
Flow maps (also cold comb maps when used for in-game hair) are vector maps that are mainly used for animated shaders (flowing hot lava) or to drive the anisotropy effect of specular reflections for hairs.
Currently there is no perfect solution for painting flowmaps. Mari by far has the best implementation of a vector tool, but having to buy Mari just for this is not convenient.
Here is a video of how to "hack" paint a flow map using 2d painting software like photoshop, painshop pro or krita:
The shown technique is far away from perfect.
This would be very to be able to paint vector and flowmaps like Mari can. Being that Painter already supports so many mesh inputs, being able to paint vector and flowmap and even bake particle fields to flow would not be too diffcult to support.
Mari Vector and flowmap workflow: https://www.youtube.com/watch?v=EqRQcKLXR0k
I channel mostly for painting directional/flow maps would be nice.