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Scene Components Disappear in small spaces

Just Me

June 03, 2018 23:43

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I have noticed that when viewing some experiences that use small spaces, floors, ceilings, walls, and objects within can disappear when viewed at certain angles.

In my house in my Real Estate Plot experience, when I walk into the bathroom, the floor derezzed.

In the last room of the wonderful and atmospheric experience https://atlas.sansar.com/experiences/ria/little-giant parts of the bed flicker in and out of view as I scope the room, also the table in the middle of the room does not rez, the notes are floating.

It would appear that near clipping is set too far so the geometry is clipped.

I have tried different settings without any change. 

4 comments

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  Galen June 04, 2018 01:34

  This is a result of viewing frustrum culling. The centroid of the object is outside your camera's viewing frustrum, so the engine assumes it's no longer visible to you and removes its trigons so the renderer doesn't have to display them.

  This algorithm could be improved.

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  Just Me June 04, 2018 07:36

  Agreed that's logical, but wouldn't explain the missing table, when the notes upon it are visible, or that the bed parts are ones that are further away.

  Perhaps someone actually viewing the effect could better explain?

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  Galen June 04, 2018 07:47

  Ah, yeah. This one is a longstanding problem. When I first joined, Little Giant was pretty flawless. This bad behavior appeared not long after.

  Here's a quick video snippet of the behavior for those wondering:

  https://gyazo.com/c15b33ef5dfb36843f92c62dd8d52b03

  And yeah, probably not a culling frustrum problem. But possibly a result of some hidden facets tripping up the occlusion culling algorithm.

  Edited by Galen June 04, 2018 07:48
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  Just Me June 04, 2018 07:57

  That's the one. Still a mystery where the table went to, assuming it was ever there in that instance of the experience. Perhaps the creators could interject?

  Sansar doesn't handle small detailed places, which is a bug in my opinion and should be looked at, nothing quite like the floor disappearing to break an illusion.

  It is a wonderful experience either way, I enjoyed it and would like to see more of the creators work.