Hasta La Motion!

as Ron said " Assume we are working with an image shot on a blue background. The first step the color difference method involves the creation of a new image in which this blue backing is suppressed to black. This is done by selectively substituting the green channel for the blue channel in every pixel in which the existing blue component has a greater intensity than the green component. In other words, for each pixel,

If Blue > Green
then New blue = Green
else New blue = Blue "

so Ron is telling to substitute the green channel for the blue channel and then put a condition. I tried a lot to do this in nuke. But ended scratching my head.So please all Vfx artists give it a try it will be great help.Thanks:)

i sometimes have scripts, that seem to run in some kind of endless loop. Usually, when the script runs smooth, cpu usage is barely at 50%. But sometimes, cpu usages peaks at 100% as shown in the taskmanager, yet nothing happens! I can see some nodes blinking in the DAG, but no process at all in the viewer. And believe me i have waited long enough to make sure that really nothing happens. This is very annyoing as it seems to happen very random. Has someone had similar behaviour?
I have a Intel Core 2 Quad at 2,67GHz with 8 GB Ram.

does anyone know how to write tile-based exr out of nuke?

If there is any converter out there it would help me too.

EDIT: Found it! http://www.openexr.com/downloads.html Download the precompiled windows version and look into the bin dir…there is a program called exrmaketiled.exe

thx
Oli

There are a couple of Effects in After Effects that I like to know about their equivalent in Nuke..
for instance the Displacement effect in AE .. what is it’ equivalent in Nuke?
or also cholorama.. ??

thank you in advance

As normal my teammate render out a EXR sequences which contains a collection of pass included Object_ID. We used 3DSMAX and V-Ray to render result out.

I do the compositing job but I dont know how to step by step select an ID from VRay_ObjectID to do color correction, my friend demonstrate for me how to take out ObjectID and do color correction in FUSION just 1~2 breaths, but for Nuke I have to search through this forum and google a lot, but most of the replies focus on download Gizmo and install, but all the Gizmo works look like just a key, when I use these Gizmo the problems appears immediatly because of the object edge, the mate can not knock out what I selecting like a real alpha channel.

Is there any way that I can do this in Nuke as a simple way like Fusion ?

Thansk all,