Render Mask in Blender

V-Ray V-Ray Common Tutorials, Tips & Tricks
1

In Max/vray exist cool feature Render Mask. Is it possible to use it in Blender vray?

2

> Is it possible to use it in Blender vray?

Now yes: https://github.com/bdancer/vb30/commit/475b9763073a788f83902defacc171965e49b4ff

“Update exporter” will help.

3

This is nice feature indeed, I tested it supports many object ID’s at the same time like “1,5,10”. Good thing is that you can mix masked/normal images inside Blender because VFB does not support that yet :slight_smile:
Thank you and remember 3dmax system also (selected objects) :slight_smile:

4

Thanks a lot bdancer! Working as a charm! Max’s “selected object” option would be also cool, but with object ID available it is not problem.

5

Little script to render mask only selected objects. Just set render mask type to Object ID, select objects and run the script.

import bpy
index = []
ID = 32767
for o in bpy.context.selected_objects:
    index.append(o.pass_index)
    o.pass_index = ID

bpy.context.scene.vray.SettingsImageSampler.render_mask_object_ids = str(ID)
bpy.ops.render.render()

c = 0
for o in bpy.context.selected_objects:
    o.pass_index = index
    c += 1

6

Render mask script for selected objects: http://www.pasteall.org/60832