Bug on trying to move over the edge of loaded playworld.

[Ygarr]

v: 5.2.0
If the world not loaded properly and you stay on the edge of viewable blocks - you cannot move, stuck, cannot return to loaded part of world.
And it is a lot of waiting time need to stay while world began to load. And you wasting your time instead of go further.

[skaldarnar]

Thanks for reporting!

This seems to be another instance of the well-known "world gen is too slow/performing badly/misbehaving". This is regularly happening during play tests as well. The severity/extent varies drastically on different machines.

We need to collect all the info we can get on this at one place at some point to really dig into what is happening here.

As a "quick fix" sometimes changing the rendering distance helps to re-generate the chunks (you can easily change it with Page Up/Page Down, I think).

Related Issues

• Race condition / bad initialization order during game start vs chunk generation #2385
• World storage / phase improvements #2774

[soloturn]

AI-assisted update. Filed by agent driven by @soloturn via GDD.

Tested this morning: flying to the edge of loaded world and back, on top of #5363 (late light merging) plus #5374 (stacked on it - stops duplicate chunk generation and a light/mesh data race found while profiling exactly this kind of stall). No stuck-at-the-edge, no long unresponsive wait.

That matches what profiling found this is: not a separate bug, but the "world gen too slow/misbehaving" class @skaldarnar called out above. Two concrete things were making it worse than it needed to be, both now fixed on those branches:

• ChunkProcessingPipeline could submit the same chunk for generation twice under load (a get-then-put race) - wasted up to half of generation throughput on redoing work already in flight, right when the pipeline is most loaded, i.e. right at the edge of loaded world.
• Light merging used to gate a chunk's readiness on all 26 neighbours existing first, so one slow-to-generate neighbour stalled the whole edge chunk - feat(world): merge chunk light after ready, not as a pipeline stage #5363 moved that out of the critical path so a chunk goes ready as soon as its own generation finishes.

Closing - reopen if it still reproduces once #5363/#5374 land, or if this recurs from a different cause.