'Use Translucency Vertex Fog' does not work on Metal

When trying to disable vertex fog from material that is using translucent or alpha composite blend mode it does work on on SM5 but not on Metal.

It’s also seems that translucent vertex fog does get much brighter than fog for opaque objects for some reason.

Hi Kalle-H,

Thank you for submitting a bug report. I have reproduced the issue and logged it as UE-38650 which you can track on the following link: Unreal Engine Issues. Please be aware that since the issue must be reviewed and prioritized by our development staff, it may be a while before it can be addressed.

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Hi Kalle-H,

The test I created with 2 spheres, one with vertex fog from a material enabled, one disabled, is no longer showing this as a bug in UE 4.13.2. Are you still experiencing this issue and, if so, can you provide a sample project with simple repro steps that we can follow to reproduce the bug on our end?

If so, send a link to the test project zipped and uploaded to Dropbox, Google drive etc. in a private message to me on our .

Thanks,

.

There is proper fix for Mobile.
https://github.com/EpicGames/UnrealEngine/pull/4281