[Bug]: CustomWindSnow does not ensure Visibility during Fade

[Sarrg]

Before You Report

• My mods and Everest install are up to date.
• I have recreated the bug with a minimum number of mods installed.

What platform are you playing on?

Windows 11

Bug Description

In the Update call of the Backdrop class the visibility is set instantly to IsVisible(level) unless transitioning from one room to another.
This is also used to calculate visibleFade inCustomWindSnow and since the Visible field handles if the Backdrop is rendered at all this will effectly make visible fade not work when IsVisible returns false.
A potential fix for this would be to add Visible = visibleFade > 0f; right after the visibleFade is updated.
See steps to reproduce to see differences when fix is applied with exaggerated fade time.

Steps to Reproduce

bugged.webm
fixed.webm

Log Output

No response

[Sarrg]

On further notice, it seems that visibleFade then need to be initialized with 0f.
On startup this then again has the effect that it is instantly visible since it takes a while before the full screen is visible anyway.
Sadly upon screen transitioning this would cause a fade-in, not sure if this is the case for all Backdrops.
To circumvent that one could either do a late init on the first update.