After a quick search, I couldn't find the gizmo I made, but here's a quick
mock-up of what it does. I chain three noise nodes together, set them to each
output only one color channel, and then connect the Z values in the blue and
green ones to the red one, with an offset by 100 in green and 200 in blue. This
way none of the channels have the same fractal pattern, but they all seethe at
the same rate when animated. Normally I'd parent all the values to the red
noise node, so the red one becomes a controller to modify the overall scale,
and any kind of overall motion or rotation, etc. that they might need. For a
few examples of what I've done with it, my old demo reel at www.joelaude.com
(which hasn't been updated in far too long) has a few examples of fiery shots
that used my heat distortion gizmo.
Here's the snippet:
set cut_paste_input [stack 0]
version 6.3 v4
Constant {
inputs 0
channels rgb
name Constant1
selected true
xpos 114
ypos -264
}
Noise {
output {rgba.red -rgba.green -rgba.blue -rgba.alpha}
center {1024 778}
name Noise1
selected true
xpos 114
ypos -192
}
Noise {
output {-rgba.red rgba.green -rgba.blue -rgba.alpha}
zoffset {{Noise1.zoffset+100}}
center {1024 778}
name Noise2
selected true
xpos 114
ypos -158
}
Noise {
output {-rgba.red -rgba.green rgba.blue -rgba.alpha}
zoffset {{Noise1.zoffset+200}}
center {1024 778}
name Noise3
selected true
xpos 114
ypos -124
}
CheckerBoard2 {
inputs 0
name CheckerBoard1
selected true
xpos -27
ypos -264
}
Copy {
inputs 2
from0 rgba.red
to0 forward.u
from1 rgba.green
to1 forward.v
from2 rgba.blue
to2 backward.u
name Copy1
selected true
xpos -27
ypos -103
}
IDistort {
uv forward
uv_scale 50
blur backward.u
blur_scale 10
name IDistort1
selected true
xpos -27
ypos -19
}
On Oct 10, 2012, at 12:17 PM, Todd Groves wrote:
> Joe,
> This thread interests me. Can you possibly put together a script of how this
> setup might look like?
>
> Thanks,
> Todd
>
>
>
>
> On Oct 10, 2012, at 12:07 PM, Joe Laude wrote:
>
>> It'll do it just fine. Just keep playing with it. First step is to have
>> different noise patterns in red and green and blue. Then use the red and
>> green as distortion and the blue for blur (if you want to use the blur).
>> Then you tweak your settings in the idistort and 3 different noise nodes to
>> creat the desired effect. I made a gizmo for this using just these nodes,
>> but I'm not at my computer now.
>>
>> Joe Laude
>> Sent from my iPhone
>>
>> On Oct 10, 2012, at 11:50 AM, Jason P Nguyen <[email protected]> wrote:
>>
>>> I'm trying to use the noise & idistort to make my background have some
>>> engine's heat distortion ( but it has to look like "boiling heat" instead
>>> of wiggling x&y). The idistort seems like doesn't do the job well. anyone
>>> has better idea?
>>>
>>> thanks,
>>>
>>> J
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