Summary
I don’t know exactly when this started, but it’s been happening for months. I don’t recall changing any settings in any mat, but I think a past Fortnite update broke the volumetric clouds.
Right now, when a transparent material is behind the clouds while the camera is at the height of fog made from environmental height fog, it just keeps the color of the clouds and does not add the height fog to the color. When the camera is not in height fog (2026-05-20 11_27_23-Clipboard.png), the clouds work perfectly fine, and the transparent mats are obscured perfectly, but the more you move down, the more and more the clouds are obscured by the height fog, but not the transparent mats.
I have checked, and additive mats do NOT break behind clouds; it is only transparent mats.
I have tested and confirmed that newly created transparent mats also don’t work properly behind the clouds and height fog, and have attached a screenshot of it. The mat has all 3 fog settings enabled (2026-05-20 11_40_17-Clipboard.png)
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Assets
Steps to Reproduce
From what I can recall
Make a transparent mat and add something to it, like the sun or a texture.
Add it to a mesh and scale it up to be behind the volumetric clouds.
Add environmental height fog to the scene (can use default settings)
move the camera up and down into and out of the height fog, and observe
Expected Result
The transparent mat and clouds should become fully obscured by the height fog.
Observed Result
sadly only the volumetric clouds become obscured while the transparent mat only takes the clouds into account.
Platform(s)
PC
Island Code
No Code Sadly
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Video
Additional Notes
I know this has to have been from an Fortnite update because it happened in the middle of a project I was working on, and then suddenly every transparent object in the background was visible through the clouds.
