Quick smoke + fire not rendering properly in 2.81a Having just ventured into the physics of Blender, I tried to set fire to a cylinder in a previous animation. The results looked nice especially using Cycles. In the 3D viewer with Viewport Shading: rendered turned on.

However, the output does not reach the renderer when trying to output an animation. I tried the same using the default startup scene, setting fire to the default cube. Neither Eevee or Cycles will render anything: Eevee shows a blurry domain box, cycles just shows the cube.

Any suggestions? I use PC (Win 10) with 2x EVGA 1070GTX in SLI. Everything else seems to render fine, just not physics (or at least not fire + smoke for now).

Thanks for your help,
S
In the end, it was possible to "jog" Blender into rendering a frame of a burning basic torus using the default settings for Quick Smoke + Fire. I changed CUDA settings to CPU only and replaced the Output shader with a fresh default one. The fire + smoke then F12 rendered, if slowly.

When I then turning GPU Compute back on (and all GPUs + CPU on as well in CUDA settings in Preferences), the fire + smoke still rendered, and a lot faster. Have the Blender devs added GPU support to Cycles with 2.80? If so, thank you! I just find it strange that the Material Output shader needed replacing to get the physics effect to run.