Why my material isn't working?

Development Asset Creation
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1

Hello. I’m trying to create material for volumetric fog. I found a tutorial here Unreal Engine 5 Guided Tour | Talks and demos
at 12:10, but in my case it doesn’t work. The sphere with this material is just translucent:

image
image1920×933 138 KB

Where could be the problem?

2

Solution: need to add exponential fog to scene and check “volumetric fog” parameter.