Lens Effects - how to use Material ID

[Iain]

I'm working in v3, trying to create a realistic glow from an LED. I'm using Lens Effects Glow and Bloom but I can't work out how to assign a material ID so the effect only works on the emissive LED material.

The Lens Effects dialogue is asking for a material ID numeric value, whereas the only way of assigning an ID I can find in the material editor is using a colour.

I'm clearly overlooking something here - please can somebody explain how to limit the Lens Effects to a specific material. Thanks for any help offered.

[fpedrogo]

As you mention, we don't have a way to assign number to the Material IDs. However we could have the same effect if you use Object IDs. Here is a quick video that I made (non official video) to should you the workflow to use Object Id
https://youtu.be/OQqDix6qx3o

[Iain]

Thank-you, Fernando. That is exactly what I needed to learn. I'll give Object ID a try. Thanks again.