Using Indirect Multipliers!

addam davis
2 min readJan 28, 2023

Objective: Use Indirect Multipliers to add light to your scene.

If you have followed along with my tutorials, you will have set up a light probe group.

If you want to increase the potency of your lights but you don’t want to bake anymore of your scene you can do this with Indirect Multipliers.

You can use this value to carry the intensity of indirect light. If you set the Indirect Multiplier to a value lower than 1, the bounced light becomes dimmer with every bounce. A value higher than 1 makes light brighter with each bounce.

This is useful, for example, when a dark surface in shadow needs to be brighter to make detail visible.

This is a point light in the middle of the scene with the Indirect Multiplier set to the default value of 1.

Remember this is a giant room I’m working in. This is what it looks like just bumping the multiplier up to 1,000.

Just in case it is too difficult to see the differences, here is the same point light with the Indirect Multiplier set to 10,000.

Obviously when working in a more reasonable space you won't need to use such drastic increases. This was for the sake of demonstration. Don’t be afraid to experiment with using Indirect Multiplier, and I’ll see you in the next tutorial!

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