I am creating a structure that generates on the ocean surface with the Jigsaw Structures Experiment. However, when I set the jigsaw's heightmap_projection to world_surface, it generates on the ocean floor.
Taking what I can from the very incomplete docs, this should generate it on the ocean surface. In addition, there is a separate heightmap_projection for ocean_floor, so it makes sense that world_surface would place it on the top of the ocean.
Steps to Reproduce:
Attach mcpack to a Minecraft Preview world with Data-Driven Jigsaw Structures enabled.
Locate structure ( /locate structure httyd:dragon_hunter_ship )
Notice structure is nearly always on the ocean floor
Observed Results:
The structure is on the highest solid block.
Expected Results:
The structure should be on the highest non-air block, which is water.
Attachments
Comments 6

We do not have enough information to reproduce this issue.
Please include the following information to help us understand your problem:
Steps to Reproduce:
1. (Explain what needs to be done for the issue to happen)
2.
3.Observed Results:
(Briefly describe what happens)Expected Results:
(Briefly describe what should happen)
Please also attach any needed commands, add-ons/behavior packs, data packs, resource packs, screenshots, videos, or worlds needed to help reproduce this issue.
Refer to the Bug Tracker Guidelines for more information about how to write helpful bug reports. Bug reports with insufficient information may be closed as Incomplete.
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
Quick Links:
š Bug Tracker Guidelines ā š¬ Community Support ā š§ Mojang Support (Technical Issues) ā š§ Microsoft Support (Account Issues)
š Project Summary ā āļø Feedback and Suggestions ā š Game Wiki
We do not have enough information to reproduce this issue.
Please include the following information to help us understand your problem:
Steps to Reproduce:
1. (Explain what needs to be done for the issue to happen)
2.
3.Observed Results:
(Briefly describe what happens)Expected Results:
(Briefly describe what should happen)
Please also attach any needed commands, add-ons/behavior packs, data packs, resource packs, screenshots, videos, or worlds needed to help reproduce this issue.
Refer to the Bug Tracker Guidelines for more information about how to write helpful bug reports. Bug reports with insufficient information may be closed as Incomplete.
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
Quick Links:
š Bug Tracker Guidelines ā š¬ Community Support ā š§ Mojang Support (Technical Issues) ā š§ Microsoft Support (Account Issues)
š Project Summary ā āļø Feedback and Suggestions ā š Game Wiki
Steps to Reproduce:
Attach mcpack to a Minecraft Preview world with Data-Driven Jigsaw Structures enabled.
Locate structure ( /locate structure httyd:dragon_hunter_ship )
Notice structure is nearly always on the ocean floor
Observed Results:
The structure is on the highest solid block.
Expected Results:
The structure should be on the highest non-air block, which is water.
Ā
I just attached the add-on to the files.
After further testing, I have discovered a possible workaround for this specific use case.
Typing in "/place structure httyd:dragon_hunter_ship ~ 63 ~ true" (true means ignore start_height) will place the structure at a specific location. Being able to set a specific xyz value in the jigsaw file, instead of a start_height and heightmap_projection, could open up the ability for floating structures that are based on coordinates, not world generation.