Houdini | Redshift : Volume Rendering From Volume VOP

Left image is Mantra render, right is Redshift render. Mantra render time was 1m32s, Redshift render time was 10s.

I usually use stopped smoke from Volume VOP. Then I have to do the making on Redshift, but It has several problems in Redshift Light settings.

Particle Using Normal Force By Volume

"Volume From Attribute SOP : N(normal)" and "Advect By Volumes POP (Up date Velocity)"
Nomal was maked by VOPSOP.

Particle Arrange Using VOPSOP : Volume Sample From File, Volume Gradient From File

VOPSOP : Using "Volume Sample From File", "Volume Gradient From File"