Phoenix FD not rendering transparent

[k_18]

Hi, we are running into shading issues on a simple splash scene with Phoenix FD: Basically, we want to render an ocean surface/liquid sim transparent and use translucency to control where it is more opaque.
The thing is: We cannot get it to render completely transparent no matter what. Even if diffuse is at 0, reflection is at 0, IOR is at 1 and refraction is at 1 / 255,255,255 it renders like tar - see attached. Are there any additional parameters we need to set on the liquid itself?

Second question while we are at it: Is there any way we can use the velocity values stored in the sim on a shading level? Say for artistic purposes that we want splashes to emit light the faster they are or something along the lines...

[hermit.crab]

Hi, we are running into shading issues on a simple splash scene with Phoenix FD: Basically, we want to render an ocean surface/liquid sim transparent and use translucency to control where it is more opaque.
The thing is: We cannot get it to render completely transparent no matter what. Even if diffuse is at 0, reflection is at 0, IOR is at 1 and refraction is at 1 / 255,255,255 it renders like tar - see attached. Are there any additional parameters we need to set on the liquid itself?

At first glance, you may need to increase the Max Transparancy levels (Render Settings > Overrides > Materials).

Second question while we are at it: Is there any way we can use the velocity values stored in the sim on a shading level? Say for artistic purposes that we want splashes to emit light the faster they are or something along the lines...

Try setting the Maya native's Particle Sampler velocity output as the self-illumination of the shader.