The inclusion of the word "rune" in your search string is a hallmark of the piracy/scene community. It acts as a signature for a repacker or cracker.
What is interesting from a cultural standpoint is that versions like v4113630146 become "artifact builds." In the official Steam ecosystem, games auto-update, and old builds disappear. However, in the scene, these specific version numbers become fossilized records.
This one feels plausible. Reports suggest a 5-10 FPS uplift in Wyrm’s Crossing and the Lower City, specifically when casting multi-projectile spells (Eldritch Blast, Magic Missile). If true, this would be a bigger deal than a new quest.
The r/BaldursGate3 subreddit exploded with mixed reactions upon the rollout of v4.113.630.146.
Positive:
"My game finally doesn't crash when I cast Chain Lightning in the Steel Watch Foundry. The Rune shader cache is magic." – u/TavTheMighty
Negative:
"Why did Larian break my barrelmancy build? I liked teleporting out of the House of Hope with the Orphic Hammer. That wasn't a bug; it was emergent gameplay." – u/ChaoticNeutralLoot
Neutral/Confused:
"Who is 'Rune'? Is that the name of the developer who fixed Karlach’s hair? Or is it a reference to RuneScape? Why does Gale say 'By the Rune' sometimes now?" – u/AstarionsPajamas
Larian’s lead writer, Adam Smith, later took to Twitter (now X) to clarify: "No, 'Rune' is not a scrapped companion. It's just the internal name for our visual scripting language. Chill."