texture driven emissive intensity

Foundry Modo (Developed by stenson, Integrated Plugin developed by Paul Kinnane)

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jwfvr
Licensed Customer
Posts: 97
Joined: Tue Nov 17, 2020 11:17 pm

hi -

I am trying to create a scene with lots of candles and I need flickering lights- not getting to close with the camera so I don't need the flame, but I am thinking its possible to drive the emissive strength with a texture to get an easy randomization - I can do this in Unreal, I assume I can do it here but I not getting it - is this possible? just an offset sine wave might work... thank you
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face_off
Octane Plugin Developer
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Joined: Fri May 25, 2012 10:52 am
Location: Adelaide, Australia

Hi

Which nodes are you using to do it in Unreal please? The Emission Power is a Float, so I don't see an obvious way to plug a texture into it.

Paul
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jwfvr
Licensed Customer
Posts: 97
Joined: Tue Nov 17, 2020 11:17 pm

sine.PNG
I should have clarified -Unreal has an emissive COLOR input - but you can plug in any number of combinations to drive the "pulse" or the strength of the emissive. if I just use a sine node, the light will pulse. I get the incompatibility, I was just wondering if there is a way to mimic this in octane - its very useful and makes for an easy "flicker" but if there is an alternative that gives the same effect I am all ears. thanks
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sine_w_image.PNG
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face_off
Octane Plugin Developer
Posts: 15693
Joined: Fri May 25, 2012 10:52 am
Location: Adelaide, Australia

Hi

If you create and Octane Override for the material, you should be able to use the exact same nodes that you have in the Unreal plugin. Something like the following. You can animate the "Octane Transform Value" Y Rotation, etc rather than using the Time (although I think there is probably a Modo channel modifier for time that you could use too).

Paul
Attachments
sine.png
Win7/Win10/Mavericks/Mint 17 - GTX550Ti/GT640M
Octane Plugin Support : Poser, ArchiCAD, Revit, Inventor, AutoCAD, Rhino, Modo, Nuke
Pls read before submitting a support question
jwfvr
Licensed Customer
Posts: 97
Joined: Tue Nov 17, 2020 11:17 pm

this is great! I will give it a shot -thank you Paul!
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