What you experience with the Light node is simply due to the fact that it is unsupported at the moment (and should probably be removed from the docs to avoid confusion).
Therefore there is no menu item for it even though the old plugin is still lingering.

You could create your own menu item for it if you wanted by doing the following:
hit x to open the script console then type something like:
menu "3D/Unsupported Stuff/Light" Light

you will find a new sub menu called "Unsupported Stuff" in the 3D menu. In there you will find the "Light" item which, wenn chosen, will execute the "Light" command, which in this case is the plugin you're looking at (the command can be any tcl code as well).

If you want Nuke to start up with extra menu/menu items like this just create a menu.tcl file (simple text file) in your ".nuke" directory and add the above line to it.

Maybe have a look at the tcl tutorials I posted here, they might be of interest to you.

cheers,
frank

if it's in the gui by default it's supported.
if you have to dig around and call something through the tcl console it's probably not

as far as I know there is no such thing as Channel>Expression, maybe you mean Color/Math/Expression?!

What exactly do you mean by "UV remapping"?
yes, you can enter expressions into almost any knob in Nuke but what to mimic Shake's DistortX you should use Nuke's STMap. Difference being that in Shake you still have to scale the values to the image size while STMap in Nuke normalizes it for you so 0,0 is the lower left corner and 1,1 is the upper right one.

If you wanted to use IDistort to achieve the same effect you get with STMap you would need quite different UVs because IDistort pulls the new pixel from coordinates relative to the current pixel position whereas STMap pulls pixels from an absolute position in the image.

QUOTE(blur1 @ 10/31/06, 12:28 PM) [snapback]251229[/snapback]
I was able to do the UV remap with STMap but it would be cool to do it with IDistort too.
Thanks again

Use these expressions in a Color/Math/Expression n ode for u and v respectively:
u*width-x
v*height-y

After that you can use an IDistort to get the same kind of result as the STMap would produce.

here are the nodes:

Expression {
channel0 {uv.u -uv.v}
expr0 u*width-x
channel1 {-uv.u uv.v}
expr1 v*height-y
channel2 none
name Expression1
selected true
xpos -326
ypos 35
}
IDistort {
channels rgb
uv uv
name IDistort1
selected true
xpos -326
ypos 61
}

QUOTE(blur1 @ 11/01/06, 05:27 AM) [snapback]251293[/snapback]
I'm referring to page 54 of the Nuke User Guide pdf.
"To apply expressions to channel values:
1. Click Channel>Expressions to insert an Expressions node at the
appropriate point in your script."

That looks to me like a severe documentation bug. Same with "Multiply" mentinoed on the page before. These operators are both in Color/Math/ not in the Channel menu.

QUOTE(blur1 @ 11/01/06, 05:27 AM) [snapback]251293[/snapback]
In this case I just rendered out a pass from Maya with the UV's of the geometry exposed in the red and green channels, allowing me to apply a texture in Nuke.

never done it that way but sounds cool .

QUOTE(blur1 @ 11/03/06, 03:51 AM) [snapback]251477[/snapback]
What other way is there??

I've only dealt with static geometry in which case I export objs with uvs and texture them in Nuke.