Smoke simulations

[Michael1]

I've been following some of the introduction to fluid dynamics tutorials on the sidefx website. I have a sphere which is my smoke object, then I have the density of the gas controlling the colour ramp of the smoke shader. If you've seen the video's he does something very similar using temperature.

I'm now trying to render out sub frames. In my mantra node, in the frame range settings the increment is set to 0.2. However when I render out, every 4 or 5 frames are just black, without my smoke. Its as if the smoke hasn't been calculated often enough to render out at such small frame increments. Perhaps its something else causing it, but thats my best guess.

Any ideas how to over come this?

[johner]

I've been following some of the introduction to fluid dynamics tutorials on the sidefx website. I have a sphere which is my smoke object, then I have the density of the gas controlling the colour ramp of the smoke shader. If you've seen the video's he does something very similar using temperature.

I'm now trying to render out sub frames. In my mantra node, in the frame range settings the increment is set to 0.2. However when I render out, every 4 or 5 frames are just black, without my smoke. Its as if the smoke hasn't been calculated often enough to render out at such small frame increments. Perhaps its something else causing it, but thats my best guess.

Any ideas how to over come this?

Hmm, never done this myself, but have you tried increasing the "Sub Steps" parameter on the DOP Network itself, under the Simulation tab?

[Michael1]

That looks as though it has worked, I'll get a chance to test it more fully later. Thanks

Hmm, never done this myself, but have you tried increasing the "Sub Steps" parameter on the DOP Network itself, under the Simulation tab?