Hey!
I'm trying to use shelf tool, “Billowy Smoke”, applying on sphere. When I play the simulation on “obj” level, simulation updates and grows. But inside the “pyro_sim” node, simulation doesn't update at all. In “Houdini 15.5” it works perfectly. But in “Houdini 16” it doesn't work. What is the problem?

Hmm..I just tried your test and it works ok on my H16 system. I see smoke growing at both levels.

Try diving inside the simulation and locate the pyro node. Under the Guides tab then under Visualization make sure something is checked on, like Multi Field.

“Multi Field” is checked by default, doesn't work. I reinstalled Houdini, but it still doesn't work. Anyway, thanks for reply! I will wait for another build.

If your hardware is flawed, waiting for a new build won't matter. What graphics card are you using? Does your computer meet the minimum requirements to run Houdini?

My rig: Intel Core i7-5820K with GTX 1070 8Gb.
In Houdini 15.5 everything works correctly (till now I didn't find any bugs). It just problem with Houdini 16. Tomorrow I will check, if this problem also occurs on my work's computer.