how to make smoke darker

3D Studio Max Plugin (Export Script Plugins developed by [gk] and KilaD; Integrated Plugin developed by Karba)
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coilbook
Licensed Customer
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Joined: Mon Mar 24, 2014 2:27 pm

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
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clear smoke.jpg
Last edited by coilbook on Sun Jul 10, 2016 7:43 pm, edited 2 times in total.
coilbook
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and by the way what does velocity scale do in phoenix fd (octane volume) ?
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haze
OctaneRender Team
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Joined: Sun Feb 08, 2015 8:57 pm

Hi coilbook, it looks like you should try to decrease your volume step length

Velocity scale increases/decreases the effect of volume motion blur
coilbook
Licensed Customer
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Joined: Mon Mar 24, 2014 2:27 pm

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
coilbook
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Joined: Mon Mar 24, 2014 2:27 pm

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.
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flames.jpg
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coilbook
Licensed Customer
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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
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flames.jpg
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haze
OctaneRender Team
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Joined: Sun Feb 08, 2015 8:57 pm

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
coilbook
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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
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haze
OctaneRender Team
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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.
coilbook
Licensed Customer
Posts: 3032
Joined: Mon Mar 24, 2014 2:27 pm

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
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