Rendering fire

[XavBo]

Hey XavBo,

would you send us the scene to check what's wrong? Meanwhile, you can try Extra Margin grid option

Could you please send me an eMail so I can send you the scene?
Thank you.

[Svetlin.Nikolov]

Hello,

It's support@chaosgroup.com

Cheers!

[XavBo]

Hi Svetlin.
I will send the file tomorrow.

Thank you in advance!

[Svetlin.Nikolov]

Hey,

Got the scene! So the adaptive grid by smoke does not work because you don't have Smoke simulated at all - you have set both the fire and opacity to be based on the temperature channel. You can enable the Smoke channel from the Output rollout and check if it's in the simulated caches from the Simulation rollout's Cache File Content list. Basically, if you want to use a channel, you have to make sure it's simulated first

If you choose to adapt by temperature, you can set the threshold as low as about 301 - not that 300 (in Kelvins) is the default temperature in the Phoenix simulator, so if you go below that, the grid will start expanding infinitely.

Some more notes on your older posts - the GPU preview is a very simplified version of the real rendering so it does not support many advanced rendering algorithms, like GI. Also, it does not support Self Illumination of the smoke by the fire, so it would look as if you went into the Fire Lights rollout and unchecked Emit Light. Actually self illumination for the GPU preview was supported, but it's slow and you can just render it to get the final result

A note on the emitter sphere separating from the simulation - if you are seeing this while the simulation is running, this is normal - the last simulated frame has not finished yet, but the scene geometry has advanced so the simulation can read the new state of the scene. Once the simulation stops, you'll be able to see the alignment of the objects with respect to the simulation correctly.

Hope this helps!

[XavBo]

Hi Svetlin,

Thank you for your answer and help!

I will have a look later.