Hand invisible in first person when used alongside Aeronautics (Veil pipeline conflict)

[zedrefthegamer-max]

When RenderScale is installed alongside Create Aeronautics (which bundles Veil internally), the first-person hand disappears approximately 2 seconds after joining a world. On subsequent world joins within the same session the hand is instantly gone. The hand is visible in F5 third-person view — only the first-person render layer is affected. All items affected, not just modded ones.Reproduction:

Install RenderScale + Create Aeronautics 1.1.3 + Sodium on AMD GPU
Join any world
Hand visible ~2 seconds then disappears
Leave and rejoin — instantly gone

Environment:
NeoForge 21.1.228, MC 1.21.1
RenderScale 1.3.5
Aeronautics 1.1.3 (bundles Veil internally)
Sodium 0.6.13
AMD Custom APU 0405 (Steam Deck, Mesa 25.3.5)
Notes:
Removing RenderScale fixes the issue entirely. Confirmed through extensive bisect testing — all other mods ruled out. Likely a framebuffer conflict between RenderScale and Veil's render pipeline.

[Derpford]

It looks like the hand renders at a way lower scale than it should in some cases, such as when holding a TaCZ firearm.

[Neko2n]

This bug has been driving me insane, glad to know it's render scale. Hope it gets patched soon

[kaito3141]

I was able to reproduce what appears to be the same issue with a minimal mod setup that does not include Aeronautics. I also found a temporary workaround.

Temporary workaround

1. Start Minecraft.
2. Enter a world.
3. Open the mod config screen and change the Render Scale value to any different value.
4. Save the change.

After saving the change once, the first-person hand/held item becomes visible again.
The Render Scale value does not seem to matter. I can change it back to the original value afterward, and the hand remains visible.

However, the issue occurs again after certain actions, including:

• Alt+Tabbing to another window and returning to Minecraft
• Leaving the current world and entering a world again

After that, I have to change and save the Render Scale setting again to make the hand visible.
Because of this, the workaround is only temporary and is not very practical for normal gameplay.

I also captured a latest.log while reproducing the issue with the following exact sequence:

1. Entered a world — the first-person hand was invisible.
2. Changed Render Scale from 1.0 to 0.5 and applied the setting — the hand became visible.
3. Changed Render Scale from 0.5 back to 1.0 and applied the setting — the hand remained visible.
4. Left the world and entered the same world again — the hand became invisible again.

Environment

• OS: Windows 11
• CPU: Intel Core Ultra 7 255H
• GPU: Intel Arc 140T
• Minecraft: 1.21.1
• NeoForge: 21.1.248
• Launcher: Prism Launcher 11.0.3

Minimal mod setup

• Cloth Config v15 API 15.0.140
• RenderScale 1.3.5
• Sable 2.0.3

I was able to reproduce the issue with only these mods installed.
If I disable either Sable or RenderScale, the issue no longer occurs.

I hope this additional information helps with reproducing the issue.

[Zolo101]

Can't reproduce this on 1.4.0 alpha 6 https://modrinth.com/mod/renderscale/versions?g=1.21.1
Is it fixed for anyone?