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how to make smoke darker

Posted: Sun Jul 10, 2016 7:00 pm
by coilbook
Hi we use phoenix fd and smoke seems too clear. Changing absorb scale makes fire look very noisy.

Scatter scale makes fire less visible.

Any way to use textures or just change smoke color or flame color manually somehow? etc


This is the goal we are trying to achieve like on the picture Thank you

PS I read that absorp scale/ scatter scale is smoke darkness. but what if I need green smoke. How do i make it happen in Phoenix FD

Re: how to make smoke darker

Posted: Sun Jul 10, 2016 7:05 pm
by coilbook
and by the way what does velocity scale do in phoenix fd (octane volume) ?

Re: how to make smoke darker

Posted: Sun Jul 10, 2016 9:38 pm
by haze
Hi coilbook, it looks like you should try to decrease your volume step length

Velocity scale increases/decreases the effect of volume motion blur

Re: how to make smoke darker

Posted: Mon Jul 11, 2016 1:30 am
by coilbook
haze wrote:Hi coilbook, it looks like you should try to decrease your volume step length

Velocity scale increases/decreases the effect of volume motion blur
seems like fire still looks to clear
Jimstar got it to work with phoenix and all we have is absorp scale emission scale scatter scale

Re: how to make smoke darker

Posted: Mon Jul 11, 2016 2:44 am
by coilbook
We are trying to achieve rich orange red flames but get pale yellow. IS there anyway to change color of flames like in the picture.

Medium in OCtane Volume

Posted: Mon Jul 11, 2016 3:51 am
by coilbook
there is a medium button in Phoenix OctaneVolume
So we assign Volume Medium and try to change flame color but cannot? How can change flame/smoke color? Thanks

Re: how to make smoke darker

Posted: Mon Jul 11, 2016 4:31 am
by haze
Remember that for the color of the flames to shine through the smoke, the smoke must scatter light. Make sure your scattering color is not black, make it white while you are adjusting the color of the flames. The volume step length should work if you set it to something much smaller, such as 1 or 2

Re: how to make smoke darker

Posted: Mon Jul 11, 2016 5:22 am
by coilbook
haze wrote:Remember that for the color of the flames to shine through the smoke, the smoke must scatter light. Make sure your scattering color is not black, make it white while you are adjusting the color of the flames. The volume step length should work if you set it to something much smaller, such as 1 or 2
Seems like messing with absorption (as value) and volume length back and forth while Octane viewport is open crashes actual nvidia drivers

Re: how to make smoke darker

Posted: Mon Jul 11, 2016 6:12 am
by haze
I am aware of cases when reducing the step length too much causes kernels to take too long, and eventually timeout, depending on hardware and how heavy the scene is. But it should not crash nvidia drivers. Please let me know exactly what settings crashed it.

Re: how to make smoke darker

Posted: Mon Jul 11, 2016 4:10 pm
by coilbook
haze wrote:I am aware of cases when reducing the step length too much causes kernels to take too long, and eventually timeout, depending on hardware and how heavy the scene is. But it should not crash nvidia drivers. Please let me know exactly what settings crashed it.

It crashed nvidia 362 drivers when moving volumestep length and absorption up and down