#Need "Hot" Effect
5 messages in this thread
I am currently rendering a series shots where a futuristic craft takes
off vertically, rotates its engines, and flies away. This is all being
rotoscoped over captured video. I render over the video in Imagine, and
then use an unaltered set of captured video frames and the rubthrough
function of DCTV paint to restore the forground objects. This works out
VERY well. But now, in the closeups, I want to render the "heat signature"
of the engines. I know with some experimenting I could come up with a
combination of object, attributes, and textures that would work. But since
tests for this effect will need to be raytraced to get the refraction of
the background it WILL be time consuming. So I am wondering if anyone out
there has already tackled this problem and can give me a little head
start. Thanks in advance.
…Warp Engine Engaged…
-Paul-
Sounds like you could use alpha channel for the compositing, it'd make your job
easier, and maybe use it for the heat signature stuff, too. Let me think on it
for a bit, and I'll upload a text file.
Jim Shields
Regal Rodent Development
How does the alpha channel feature work on imagine? is it kind of like using a
greyscale pic to blend brushes on to surfaces?, where do you access it? Edgar.
I wasn't talking about an alpha channel feature of Imagine; as far as I know
there isn't one at this time, but it is planned for a future release. I was
talking about using travelling mattes and alpha compositing, probably within
ADPro. That's how I do graphics over video capture sequences.
Jim Shields
Regal Rodent Development
I think I remember reading alpha channel support on of the ads for Imagine, but
I don't know what they mean by that, I understand what you are talking about. I
once did something like that by using a linear gradient on a cylinder placed at
the scapes, and made a filter map of a greyscale image to go from fully
transparent to solid, I changed the axes position over time (3 d using 3
different objects, to give it a variation (activity), maybe that will work for
you, unless you are looking for the distortion effect that heat creates. edgar.