VrayObjectID pass in Blender

[B_S]

in 3ds max are VrayObjectID (examples http://ru.renderstuff.com/discussion.../000000174.jpg http://i.ytimg.com/vi/gWnpIFMK_b0/maxresdefault.jpg what i mean) render element. He give in result pic with obj id color pass. With This script http://www.scriptspot.com/3ds-max/scripts/idtool in one click we recieve random object id per all selected objects. With this two simple steps we have a pass with convenient color information for comp\color correct.

question: how to likewise easy take this VrayObjectID pass in Blender?

[bdancer]

1. "Render ID" pass
2. "Node ID" pass ("Relations" -> "Pass Index" is used in this pass)

[B_S]

Render ID - is cool. thanks.
p.s. for me general lack - is vray4blender very different from vray4max - nodes is cool - in fact - but all knowledge from 3dsmax here not work. I seen you start write documentation. But there are disadvantage - in the description of the nodes no information about where and how it is used mostly.
For example - i even did not understand how to use "Node ID"
But it is not significantly

[bdancer]

i even did not understand how to use "Node ID"

Well, the same way as "Render ID":

[blendervrayf]

this is a great tip...

[blendervrayf]

could you tell me how to use the z-depth channel for create the depth of field in post production ??
in the animations I would like to speed up render time but I'm not able to create a map to use in post

[B_S]

[B_S]

http://docs.chaosgroup.com/display/VFBlender/Z-Depth

[bdancer]

blendervrayf, just google "vray z-depth photoshop" or "vray z-depth nuke" =)

[blendervrayf]

thank you guys ..
the problem is not with the post production but with vray.
Now I understand how to create a map with vray (I had read the guide but there's no practical reference).
Now I create the map by changing the value black end white distance and everything works but I do not understand how to use the depth from the camera.

[B_S]

but I do not understand how to use the depth from the camera.

Depth from camera show focal point. With zdepth pass you resolve another task - you can choose you self focal point. You dont need DOF for zdepth pass.

[blendervrayf]

great thanks

one last question ..
how do you export the reflection map? sorry for my incompetence

[B_S]

how do you export the reflection map

To be honest I did not understand the question.
If you mean reflection chanel (render elements)- then - as well as zdepth chan add + new chanel and

[blendervrayf]

you understood well ..almost everything is there
thank you and have a nice day

[bdancer]

Well this setup works by luck =) Render channels have it's own nodetree: Global node editor -> Q -> UP "Render Channels" ( https://github.com/bdancer/vb30/wiki/Nodes-Layout)