Bifrost Remapping Channels (Blood emitting from underwater)



The scene is a helicopter camera looking down at ocean, and blood coming from somewhere underneath the ocean surface.

I am emitting the new particles (blood) with different density inside a main liquid object (Ocean).
Problem 1 is, I wonder how to remap density to viscosity, opacity, color for the new particles in a way they can render inside the liquid object.
Problem 2 is, changing the display view of particles from velocity to density while rendering both bloody and ocean. I wonder if I can render both together to avoid multilayers.