[BUG-7085] Ghost prim

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Steps to Reproduce

walking

Actual Behavior

Ghost prim still there after sim restart

Expected Behavior

Stay on the floor. Instead I appear to walk on something which cannot be seen. Highlight invisible does not work. I cannot select it.

Other information

Original Jira Fields

| Field | Value | | ------------- | ------------- | | Issue | BUG-7085 | | Summary | Ghost prim | | Type | Bug | | Priority | Unset | | Status | Needs More Info | | Resolution | Unresolved | | Reporter | Roscoe Hush (roscoe.hush) | | Created at | 2014-08-22T06:25:38Z | | Updated at | 2017-07-07T22:16:16Z | ``` { 'Business Unit': ['Platform'], 'Date of First Response': '2014-08-22T09:46:05.680-0500', 'System': 'SL Viewer', 'Target Viewer Version': 'viewer-development', 'What just happened?': 'Ghost prim still there after sim restart', 'What were you doing when it happened?': 'walking', 'What were you expecting to happen instead?': 'Stay on the floor. Instead I appear to walk on something which cannot be seen. Highlight invisible does not work. I cannot select it.', 'Where': 'http://maps.secondlife.com/secondlife/WideWorld%20Oasis/166/157/32', } ```

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Lucia Nightfire commented at 2014-08-22T14:46:06Z

The land security orb prevented my investigation.

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Whirly Fizzle commented at 2014-08-22T17:46:19Z

The "Ghost prim" at that location seems to be part of the "Part 3" linkset - If you edit on the light beams on the ceiling you will select "Part 3". The "ghost prim" you collide with shows as "Part 3". There are also several "phantom object" scripts in this linkset - maybe a broken llVolumeDetect(TRUE) script?

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Maestro Linden commented at 2014-08-25T23:19:24Z

Hi Roscoe, I visited the location but didn't run into any unexpected collisions, when I walked around the floor in the vicinity of 166,157. If you still see this issue, can you give exact coordinates for where the 'ghost prim' appears to be?

The only 'unnatural' collision was with the transparent hollow cone that represents the light beam coming from the ceiling. These prims should be set to "Physics Shape Type: None" in the build tool's Features tab, if you want them to be collisionless (though be forewarned, doing so may make the linkset use the newer accounting system, which could cause the land impact to increase). Or alternatively, you could unlink the light beam cones and set them to be Phantom.

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Maestro Linden commented at 2014-08-25T23:24:40Z

One common source of unexpected collisions is having a large sculpt in a linkset, which has a rendered shape that doesn't match its physics shape. If you still see unexpected collisions with "Part 3", what do you see for that linkset's collision shape? This guide tells you how to view the collision shape of a linkset: https://wiki.secondlife.com/wiki/Physics_Optimization#Debugging_collision-related_performance_issues

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Saeros Linden commented at 2017-07-07T00:45:10Z

Our apologies, it appears this jira has been a victim of a spammer. We’re cleaning up the offending comments, sorry for the mess!

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Roscoe Hush commented at 2017-07-07T22:16:16Z

Thanks. I am hoping it was random.