One part of the render layer glowing?

Question

Take a look at this pic. I want only the eyes to glow without the armor glowing too (The armor got a glossy shader). How can I do that?

For something very similar see this answer: http://blender.stackexchange.com/a/35448/1853 — , Aug 17 '15 at 05:54
One simplistic approach could be to use a color or difference key. — Mörkö, Aug 17 '15 at 07:47

score 14 · Accepted Answer · 2015-08-17T14:58:25.353

14

Use a pass index on the material for the eyes.

Enable material index on the layer passes.

Add a ID mask on the compositor and use the number of your material pass index to create a mask for the glow.

EDIT

To make the glow yellow you can add color to the mask and change the final mix node's mode to add:

edited Aug 17 '15 at 14:58

answered Aug 17 '15 at 05:53

Almost the answer. It's only the eyes glowing. But they glow white! It'd be nice if you guided me how to make them glow yellow! – thododo Aug 17 '15 at 14:12
@thododo see edited answer – Aug 17 '15 at 14:58
Straight-forward and cool! Learned a little more! Thank you! @cegaton – thododo Aug 17 '15 at 15:28
Before this, I tried RGB curve but didnt come out well LOL – thododo Aug 17 '15 at 15:34

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