[MC-239876] Maps appear grey when opened in old terrain after conversion

The Bug

When Using a map that already explored terrain in 1.17. After conversion in 21w43a the map lays over that terrain as blank as if it is seeing a layer of stone over the terrain. Placing blocks will update the terrain block by block. Completely new chunks appear to not have this issue

Reproduce

Create a world in 1.17.1
Get a Map and open it
Leave and load the same world in 21w43a

Observed Result

The Map was greyed out

Expected Result

Maps would stay the same

Linked issues

is duplicated by 6

MC-239924 Gray chunks on the map Resolved

MC-239980 Maps get filled with grey spots and not terrain Resolved

MC-240060 Updated worlds not showing old chunks on maps Resolved

MC-240269 maps showing gray texture where biome terrain should be, updates old map with gray texture Resolved

MC-240822 Return of the grey lines on maps Resolved

1 more links

Attachments

Comments 4

Welcome 234 2021-10-28T15:10:23Z

Can confirm, I seen this occur on my creative world on the latest snapshot

Fry 2021-11-11T15:31:52Z

I can reproduce this in 21w43a, but not in 21w44a; is this still an issue in the latest snapshot?

anthony cicinelli 2021-11-11T15:41:02Z

It looks like this was fixed in 21w44a. After converting a 1.17.1 world to 21w44a the map appeared fine.

Fry 2021-11-11T15:44:08Z

If you still have this issue in 21w44a, try erasing the cached data (Select world in the menu, press Edit, press Optimize World, check Erased cached data checkbox, proceed)