Redshift is a blazing fast GPU renderer for multiple 3D hosts. It is also a production driven and tested renderer. Even so, the render is still fairly new. Redshift for Maya (and other hosts) doesn’t support rendering particles or fluids directly. Currently Redshift doesn’t support rendering of Maya Fluids. A recent update made it possible to convert particles behind the scenes to instanced geometry.
There is a bit more that needs to be done than simply hitting the render button if you are going to be using Maya’s nParticles. Covering the basics for rendering particles with Redshift in Maya, is Matte Painting generalist and environmental Artist Saul Espinosa. His latest tutorial will show you how you can bet color and opacity information over to a redshift material so that it can render it.
You might remember some of Saul’s work, when I posted his “little test” using redshift. A little test showing a scene that had 3 billion polygons and several 8k textures, designed to put Redshift through its paces.