Automatic ObjectID Shader

[nassosy]

I found this texture shader from "Stefan Minning" on the net, that automagically assigns
your objects a unique Color, essentialy helping you make an ObjectID pass.
It was originally for Maya and i packed it for XSI.
for both x86 and x64.
Enjoy at your own risk.

A local copy can be found here:
http://www.si-community.com/download/pl ... jectID.rar

[nassosy]

You use it by applying the same ObjectID material to all you objects
(or apply it on a Partition)
and it creates a unique color for each.
If you don't like the colors, change the "seed".

[ace63]

Hey thats pretty cool, thank you!

[eternal art]

many thanks , it's very useful .

[nassosy]

BTW, I just realized that you can do the same thing with the "p_MegaTK_pass" geometric shader.
Just create a "Geometry Shader Primitive" and add "p_MegaTK_pass" to its shader list,
in the "MR Std Channels" tab enable "Label(TAG) pass" and give it file format of your choice. That's it.
I am starting to love this shader more and more !

cheers ;)

[rasskass]

Hi,

Im completly new to Softimage. I have been using Modo for some years before my switch. Can sombody please explain to me how I install this feature and then use it? Need to seperate all my materials in photoshop and would use the ObjectID to do that.

Hope to get some help!! Thx

[zossowosso]

cool

[Hirazi Blue]

@rasskass
Unzip/unrar the file into a folder
Go to "File > Plugin Manager"
A floating "Plugin Manager" opens
Go to the SPDL Tab
Click "install"
A new window opens
Next to "SPDL File Path" click on the button marked "..." to browse to the unrarred folder
Find the "minObjectID.spdl", click "OK" to set the path.
Click "install"
The SPDL gets registered and the accompanying dll gets copied to its rightful place...
;)

[rasskass]

Excellent - now it's installed.

Could you also post how to use it? Is it suppose to be connected to each object in the scene?


Thanks for your excellent support Hirazi!!

[nassosy]

read the 2nd message

[HaDDeS]

Great tool, but it behaves strangely for me sometimes ... assigning the same ID / colour to different objects, which is not that cool. Changing the seed may fix it, but sometimes randomly some other objects will get the same colour again.

[rasskass]

Same problems here - Modo has a great ObjectID output. Sure are missing it a lot

[HaDDeS]

Ok, i feel realtively less stupid now ... XSi "just" miss the ability to export every channels to an single EXR format ... actually Mat ID , object ID are calculated but just simply not correctly exported appart for the MR files you could use in the Fxtree.

[nassosy]

Or you can use the built-in mentalray framebuffers :

1. Add an "Object ID" and "Pixel Coverage" Render Channel Output
(as tiff, or any other format you compositor can read)
2. make a mask from the ObjectID you want
3. mask(multiply) it with the Coverage channel

see here :

http://www.sigillarium.com/blog/lang/en/379/

[nassosy]

Here is a Nuke gizmo, for the mentalray ObjectID+Coverage workflow.
extract it to your "[Nuke]\plugins" directory
restart or "etc->All Plugins->update"

and

add the following line at the end of the file "menu.py" in the same "plugin" dir :
nuke.menu("Nodes").addCommand("Keyer/ObjectID_Matte", "nuke.createNode('ObjectID_Matte')")

[HaDDeS]

Thanks a lot for the Gizmo and tips nassosy, I'm working on fusion, but it is basicaly what i do with it, the only thing is, that'd be so easier to just access the Object ID number in the EXR file.