Adobe Community: Simulate fire light

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1. Rick Gerard,

Jul 21, 2012 3:10 PM in reply to captain_astronaut

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This depends completely upon your shop. Send us a a scrreen shot and I'll give you an idea.

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2. captain_astronaut,

Jul 21, 2012 3:20 PM in reply to Rick Gerard

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I'm going to have the fire in the dumpster.

The scene will obviously be much darker.

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3. Mylenium,

Jul 22, 2012 12:01 AM in reply to captain_astronaut

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The simple solution would be to create a layer with Fractal Noise on top, Mask it out to match the contours more or less, colorize it with Tint or Tritone and use Add Blending mode. Then animate the evolution and offset of the noise and add further adjustments as needed. The hard way would obviously be to duplicate your layers and use elaborate masking and coloring to fake the lighting per edge/ face. If this are 3D layers, of course using a wiggle()expression on a light's intensity property would also work to a degree.

Mylenium

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4. captain_astronaut,

Jul 22, 2012 7:16 AM in reply to Mylenium

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The simple solution?

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5. captain_astronaut,

Jul 22, 2012 6:33 PM in reply to Mylenium

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I think the "wiggle" is gonna work, but now I can't get the fire to look like it's inside the dumpster. I thought sandwiching the fire layer between two dumpster layers would be a start. I'm assuming I need to do some masking (I know a little Photoshop, but it doesn't 100% translate to AE). This is what I've got right now:

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6. Rick Gerard,

Jul 22, 2012 7:26 PM in reply to captain_astronaut

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You need to separate the dumpster into two parts. Put the foreground part in front of the flames, the background part behind. Then you need to add a copy of the flames that's blurred with probably the screen blend mode to give the appearance of firelight.

I hope this helps.

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7. captain_astronaut,

Jul 22, 2012 7:34 PM in reply to Rick Gerard

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That's what I thought I was doing with the two dumpster layers, but no matter where I place them the fire doesn't sandwich. If I change the Z axis (forward/backward?) the fire either moves in front of the dumpster or behind no matter what layer it's on.

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8. BenMarkus,

Jul 22, 2012 8:12 PM in reply to captain_astronaut

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I know I'm probably stating the obvious but the front dumpster layer doesn't appear to turned on. And, Just to be sure I'm understanding this correctly, you did seperate the back part of the dumpster from the front correct? Also, I'm not sure what you mean by this...

If I change the Z axis (forward/backward?) the fire either moves in front of the dumpster or behind no matter what layer it's on.

The fire should move in front or behind the dumpster if you change the z axis, but it shouldn't matter what layer it's on in 3D space. The layer order isn't important it only matters where you place the objects.

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9. captain_astronaut,

Jul 23, 2012 9:16 AM in reply to BenMarkus

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D'oh!! You're right, that layer was turned off.

I guess I thought layer order matters like it does in Photoshop.

I cut out the front panel on one of the dumpsters, and I think I've got the fire looking like it's inside. Now I'm looking for cropping the edges of the fire so it doesn't spill beyond the dumpster.

I really appreciate all the advice.

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10. Rick Gerard,

After Effects

Simulate fire light

Jul 21, 2012 2:35 PM

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