Hello folks,
I have a problem. I want to render fire without smoke. When I render it with the new pyro shader and turn density off, the extra image plane "pyro_fire" is just black. If I turn smoke on it works. I tried setting the density scale to 0, the Density Range from 0 - 0, cahnge the binding of smoke to temperature but all that doesn't help. The beauty pass is normal in the render view, but when I render to disk and open it in AE its still black.
I researched an found out how to do it in the old shader, but but I couldn't find something about the current shader. The smokeless flame shelf tool also uses the old shader.

How do I render without smoke (I cached the density volume) in mantra?

Why do you want no smoke? Very little smoke will have a similar effect. Have you tried a density scale from 1.0e-03 to 1.0e-05 to make the smoke less perceptible? Setting the color to 0 will optimize out any lighting on the smoke if performance is the concern.

Yeah its for render time. For my test renders, I want to export it seperately. I know I can have them separate with Image planes, but I need it for perfomance. I will try your approaches, when I get back home.

jsmack
1.0e-03

So I tried that and it did help. The problem I have now that the beauty pass with only the flame looks like the first picture.

While the fire pass look like the second picture.

The third picture is how it looks imported into after effects.

I would think that the emission doesn't take 8 minutes per frame for a viewable picture. Currently im just rendering at 1280x720 and wanted to render in 1920x1080 in the final rende. That is at least double the render time. So is that normal and I have to live with that or is there a way to optimize? And how?

edit: I'm currently rendering with 6x6 samples and 10 stochastic samples, so I thinks its odd, how wierd the finished render looks.