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IDProjectCategoryView StatusDate SubmittedLast Update
0008743opensim[REGION] OpenSim Corepublic2020-08-10 06:512020-08-16 06:34
Assigned To 
PlatformPCOSWindowsOS Version10
Product Versionmaster (dev code) 
Target Versionmaster (dev code)Fixed in Version 
Summary0008743: Gaps in rendering of water surface between regions and even into voids
DescriptionIf I look far off with the camera at other regions, there is a small gap between those regions and adjacent voids (which render as water). I am not sure if this is anything server side or if its a viewer issue. Has anyone else seen anything like this? And indeed do you see it if you visit the same regions?

Go to for example grid and region Black Rock.

On the Advanced menu make sure you have "Disable Camera Constraints" on.
Then look off and around the edges of the nearby Space City region.

I believe this only occurs on the N and E sides of the squares. I cannot see this on S or W edges.

It also definitely stretches into adjacent voids as far as I can zoom, not just around the actual region tile square.

I think this issue has been present for a while but I am just now looing more closely at when it shows.

All regions in the visible area are 256x256 and have water level at the default 20m.
TagsNo tags attached.
Git Revision or version numberopensim- (2020-08-09 16:57)
Run Mode Grid (Multiple Regions per Sim)
Physics EngineBulletSim
Script EngineYEngine
Mono VersionNone
Attached Filesjpg file icon 2020-08-10-Gaps-between-Regions-and-Void-in-Water.jpg [^] (237,465 bytes) 2020-08-10 06:53

jpg file icon 2020-08-10-Gaps-between-Regions-and-Void-in-Water-N-and-E.jpg [^] (109,368 bytes) 2020-08-10 06:53

jpg file icon 2020-08-10-Gaps-between-Regions-and-Void-in-Water-N.jpg [^] (74,665 bytes) 2020-08-10 06:54

- Relationships

-  Notes
UbitUmarov (administrator)
2020-08-10 06:54

water render is a viewer thing
aiaustin (developer)
2020-08-10 06:56
edited on: 2020-08-10 08:40

Okay... I am now wondering if this might be related to one region that is on the grid that has a water height of 20m but builds down to -20m as its mostly an undersea region. Though it is far off (deliberately)... more than 2 regions gap, but it might have an effect. [^]
Water Height: Leave this at 20.00m unless you know what you are doing; otherwise, water on adjacent regions and the edge of the world appears with a strange gap.

tampa (reporter)
2020-08-10 15:19

I would guess the angle isn't absolute and thus it is shifted slightly, but I don't see massive gaps on larger regions. Weird indeed. Have you tried other viewers yet?(although I suppose they all share this part of the code)
UbitUmarov (administrator)
2020-08-10 15:21

that warning is about diferent heights
there because must know they need to be equal
aiaustin (developer)
2020-08-11 00:49
edited on: 2020-08-11 00:49

I wondered if some sort of rounding error was occurring as you look further off with the camera. I will test a but more, and with other viewers.

But I agree with Ubit that this must be a viewer issue.

tampa (reporter)
2020-08-12 22:54

I looked around a few regions running all manners of master code and couldn't see anything like in the pictures. I tried teleporting over to yours, but it couldn't find the server, are the regions still online?
aiaustin (developer)
2020-08-13 00:34

Thanks @Tampa. I had the wrong grid in the hop/URL originally in the issued description, I copied and pasted it from the address bar and forgot that the grid address and port stay as the original login one even when HG travelling. Corrected in issue report now, and here also is the correct grid address Region name "Black Rock"
tampa (reporter)
2020-08-13 02:08

What's interesting is that there are so many regions visible, normally I only ever see the direct neighbors being rendered, never two regions over or more. Beyond that it seems the distance the water is above the surrounding void is pretty much equal all round.

I teleported to one of the edges and the effect went away, which leads me to think this must be something in the viewer not quite happy with showing regions so far from the actual avatar position.

I only every tried on a cluster of 9 regions in 3x3 config. I think this can be resolved as viewer issue as I don't think anything can be done on OpenSim end to reduce the effect without changing water height, which is not desired anyways.

- Issue History
Date Modified Username Field Change
2020-08-10 06:51 aiaustin New Issue
2020-08-10 06:53 aiaustin File Added: 2020-08-10-Gaps-between-Regions-and-Void-in-Water.jpg
2020-08-10 06:53 aiaustin File Added: 2020-08-10-Gaps-between-Regions-and-Void-in-Water-N-and-E.jpg
2020-08-10 06:54 UbitUmarov Note Added: 0036681
2020-08-10 06:54 aiaustin File Added: 2020-08-10-Gaps-between-Regions-and-Void-in-Water-N.jpg
2020-08-10 06:55 aiaustin Description Updated View Revisions
2020-08-10 06:56 aiaustin Note Added: 0036682
2020-08-10 06:56 aiaustin Note Edited: 0036682 View Revisions
2020-08-10 06:56 aiaustin Note Added: 0036683
2020-08-10 06:57 aiaustin Note Edited: 0036683 View Revisions
2020-08-10 07:54 aiaustin Note Edited: 0036683 View Revisions
2020-08-10 08:40 aiaustin Note Edited: 0036683 View Revisions
2020-08-10 15:19 tampa Note Added: 0036684
2020-08-10 15:21 UbitUmarov Note Added: 0036685
2020-08-11 00:49 aiaustin Note Added: 0036686
2020-08-11 00:49 aiaustin Note Edited: 0036686 View Revisions
2020-08-12 22:54 tampa Note Added: 0036689
2020-08-13 00:32 aiaustin Description Updated View Revisions
2020-08-13 00:32 aiaustin Note Deleted: 0036682
2020-08-13 00:34 aiaustin Note Added: 0036690
2020-08-13 02:08 tampa Note Added: 0036691
2020-08-16 06:33 aiaustin Description Updated View Revisions
2020-08-16 06:34 aiaustin Description Updated View Revisions

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