If a world is generated using The Void Superflat preset, or similarly empty custom presets, no World Icon is generated. This also occurs if the world icon is reset on an older world using these presets.
This also occurs even in regular worlds if the World Icon is reset while the player is staring into the Void in the End, or staring into the sky in the overworld with Clouds turned off.
Steps to Reproduce:
Create a custom Superflat world in Creative Mode using The Void preset. Once the world is loaded, Save & Quit, and observe that there is no world icon.
Linked issues
Comments 5
WAI per fixing of MC-93603
Regarding Dhranios's comment, this is different. This isn't a black/transparent icon, this is no icon whatsoever. Notably, this can occur even when looking at chunks that are not completely empty - for example, the starting platform in The Void preset Superflat world.
(Or, the way that I discovered it, when trying to frame a shot of a build I designed in a Void world. This build previously had an icon, but after resetting the icon in the latest snapshot to try get a good picture of the build as the new icon, it was unable to generate a new one.)
Of course it's different; this is the result of the fix for that report. Icons have gotten stricter conditions to generate with that fix. Mainly that the whole render distance needs to be loadedand at least a certain amount of the area needs to be filled with blocks.
Thank you for your report!
We're tracking this issue as MC-106645, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Won't Fix, which means this is considered a bug but won't be fixed. The description of that ticket or the comments might explain the rationale. Please do not leave a comment on the linked ticket.
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Can confirm.