[1.21.3] Transition between resource loading and first startup screen is broken

[Lolothepro]

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Minecraft Version: 1.21.1
NeoForge Version: 21.2.0-beta
Logs: Log File

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Steps to Reproduce

1. Launch the game without an options file with EDS

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Description of the Issue

The transition is from bright to dark

like here:

2024-10-22.19-37-27.mp4

The transition in Minecraft Vanilla is Smooth (Dark -> Normal):

2024-11-24_11-56-19.mp4

The text “Java Edition” is upside down on the bottom left for no reason.

On some frames, the text is not rendered

Possible Cause

• The issue appears to be related to the Early Display Screen (EDS) being active.
• Likely, some OpenGL (GL) state is leaking, causing these rendering artifacts.

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[marchermans]

What is broken here?

[ApexModder]

From what I can see the java edition text is rendering super small in bottom left corner and theres also a black flash after it finishes fading, iirc the fade should go right into the main menu no flash afterwards.

Can find how it looks in 1.21.1 below.

Interestingly it still looks a little broken in 1.21.1 (neo) too, theres the flash of black immediately after the fade in, where as vanilla does not have such flash

Vanilla - 1.21.1

NeoForge - 1.21.1-21.1.80