Red horizontal line on the horizon in iGO Luna (Android 15)

**DsF** · 11th January 2026, 09:17 PM

Hi everyone,

I'm facing an unusual graphical issue in iGO Luna 9.35.2.263562 (64‑bit) with Pongo skin (30 Sept 2025, 64‑bit) on Android 15 (Realme RMX3834). A thin red horizontal line appears exactly at the horizon in 3D view.

What I�ve observed
- The line stays fixed at the horizon regardless of map orientation (North, South, etc.).
- It becomes much more visible at high tilt levels (e.g., 8900).
- Changing 3d max tilt level in sys.txt doesn�t remove it � even at 8200 the line is still there.

Current sys.txt

[map]
3dmaxtiltlevel=8200
3ddefaulttiltlevel=8200
3dmaxzoomlevel=10000

[debug]
max_memory=524288000

Looking for advice
Has anyone encountered this red horizon line before?
Could it be related to:
- sky rendering changes in Android 15,
- something in the Pongo skin, or
- a specific UX plugin affecting 3D/sky layers?

Any hints on which sys.txt entries or UX files might cause this would be very helpful.

A screenshot is attached.

Thanks in advance!

Spoiler: screenshot

**rondoan** · Today, 10:01 AM

I installed Luna/Israel with the Wal24 skin (Pongo-based) on a Samsung S21 Ultra; there's no red line at the edge of the screen (in the sky).

IMO: an entry in the SYS.txt file won't change anything, as this is determined by the skin, and it uses the entire screen.

**Alain57** · Today, 10:09 AM

Hello,

It's not very clear from the screenshot.
But in my opinion, it's a country border line.

**Boki** · Today, 11:45 AM

He posted a good picture now
I would agree with Alain

**DsF** · Today, 12:27 PM

Thank you for the clarification. I'm still getting used to everything.

I hadn�t considered that the line might be a country border. Indeed, when looking south, the line is almost always visible, and that�s our closest border � about 100 km away.
However, in NextGen Israel this line does not appear. As far as I understand, Israel and Luna use different rendering engines.
That�s why I started thinking that this might be a rendering‑related issue specific to Luna.

**rondoan** · Today, 01:06 PM

I think so too;
in the new screenshot, it looks like what appear to be three-dimensionally compressed highways.

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