i did a a very basic animation, just a car hood, and a glue object to be the Pyro emitter and a basic roof of the car with SDF volumetric for collision, so the smoke looks like hit the roof and goes out from the windows.

in the OGL preview the smoke looks very nice but when i render looks very thin, i just use the default settings.

took like 20 min or more to render a frame with a lot of smoke in a 4 core computer, is that normal? ( i ask this becuase i did some render in XSI time ago using volumetric clouds and didn't take so long, so i am assuming that i am doing something wrong or this is the normal time for a render with volumetric s?)

thanks guys .

A few suggestions:

Did you cache out the simulation in the DOP I/O node? (there's one in both the low res and hi res objects). Go to the “export to file” tab. Once it's cached, click “load from disk.”

Try increasing the tile size in your render node to 32 or 64. properties>render>tile size

In the billowy smoke material in SHOP crank up the smoke density, for thicker smoke

Hi Arrev, i cache the simulation to a file node, just the car.
and did cache the low and the high in the Pyro node like you say.

i will try later on using a higher number on the density of the smoke thanks.