How to Use Indirect Multipliers in Unity

Objective: To look at Indirect Multipliers in our HDRP project.

This is the final article in ‘Building a Beautiful Game in Unity’ series that looks to cover using Indirect Multipliers in a HDRP project. The photo above shows where we are at after incorporating a range of HDRP features.

What is an Indirect Multiplier

This is great if I wanted to provide some light to a shadow or a dark place within the sci-fi lab that would make a detail visible for the player.

Indirect multiplier of 1 — Notice the darker corners, not giving off much detail
Indirect Multiplier of 45

The indirect multiplier of 45 is quite an extreme case but you can see the power of the indirect lighting bouncing off the surfaces to light up the dark shadowy corners. This might work well if I wanted to create an emergency type alarm in the room with this light flashing on and off.

Adjusting Indirect Multipliers in Your Project