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This repository has been archived by the owner on Feb 28, 2024. It is now read-only.
Its easiest to build these prims up in the sky so you can easily cam around and under them.
Strange moire-like patterns happen whether actual shadows and ambient occlusion are enabled when ALM is enabled or not but the effect is strongest when ALM is enabled but ambient occlusion is disabled and shadows are set to none.
Sun can be set at midday, but sun direction doesnt appear to matter.
Repro 1
Rez a torus
Set Size to: X=0.3, Y=10 and Z=10
Set Twist to: B=90 and E=90
Set Hole Size to: X=1.00 and Y=0.5
Change object type to ring.
Look at the underside of the prim.
Observed Behaviour
With ALM disabled you will see
With ALM enabled (Ambient occlusion and shadows disabled) you will see
With ALM enabled & ambient occlusion enabled (shadows disabled) you will see the black patterns are lighter grey
With ALM enabled, Ambient occlusion enabled & shadows enabled, you will see the same as the image above apart from when cammed very close to the prim, it appears as expected.
The black patterns change as you move camera angle.
When sun is set to midday and you are looking underneath the prim, the way the sunlight shines through the centre of the prim also doesn't seem to be expected behaviour, which happens when ALM is enabled or disabled - the circle of light is just more concentrated with ALM enabled.
Expected Behaviour
Not to see the black moire patterns when ALM is enabled.
Not to see the sunlight shining through the centre of the solid prim when looking underneath.
Repro 2
Rez a tube
Size to: X=0.035, Y=1.5 and Z=1.5
Set Twist to: B=-360 and E=360
Set Hole Size to: X=1.00 and Y=0.50
Set Path cut to: B=0.0 and E=0.5
Observed Behaviour
When ALM is enabled, you will see black moire patterns on the upper and undersides of the prim.
Some prims have black moire-like patterns when ALM is enabled
Type
Bug
Priority
Unset
Status
Accepted
Resolution
Accepted
Reporter
Whirly Fizzle (whirly.fizzle)
Created at
2013-10-05T16:04:48Z
Updated at
2022-04-02T00:20:30Z
{
'Business Unit': ['Platform'],
'Date of First Response': '2013-10-07T19:10:59.932-0500',
'Regression?': ['Issue is a Regression'],
'System': 'SL Viewer',
'Target Viewer Version': 'viewer-development',
'What just happened?': '.',
'What were you doing when it happened?': 'Filling in...',
'What were you expecting to happen instead?': '.',
}
The text was updated successfully, but these errors were encountered:
Marissa Linden commented at 2013-10-11T00:03:49Z, updated at 2013-10-11T00:04:59Z
Verified this issue is not operating system nor driver dependent.
Tested against the 327.23 WHQL driver, as well as the 331.40 Beta in Windows 7 64 and Vista 32. Tested on GeForce 9800 GTX in Win7, and a GeForce 8600 GT in Vista.
I also tested and reproduced the issue in Mac OSX 10.6.8 using a GeForce 8800 GS.
This issue first started to occur in the 3.6.0 builds of Second Life. It does not happen in the last released viewer before the Material Project updates were introduced (SL 3.5.3.276542.)
The camera needs to be rotated to nearly perpendicular with the underside of the prim in order to reproduce the issue.
Its easiest to build these prims up in the sky so you can easily cam around and under them.
Strange moire-like patterns happen whether actual shadows and ambient occlusion are enabled when ALM is enabled or not but the effect is strongest when ALM is enabled but ambient occlusion is disabled and shadows are set to none.
Sun can be set at midday, but sun direction doesnt appear to matter.
Repro 1
Rez a torus
Set Size to: X=0.3, Y=10 and Z=10
Set Twist to: B=90 and E=90
Set Hole Size to: X=1.00 and Y=0.5
Change object type to ring.
Look at the underside of the prim.
Observed Behaviour
With ALM disabled you will see
With ALM enabled (Ambient occlusion and shadows disabled) you will see
With ALM enabled & ambient occlusion enabled (shadows disabled) you will see the black patterns are lighter grey
With ALM enabled, Ambient occlusion enabled & shadows enabled, you will see the same as the image above apart from when cammed very close to the prim, it appears as expected.
The black patterns change as you move camera angle.
When sun is set to midday and you are looking underneath the prim, the way the sunlight shines through the centre of the prim also doesn't seem to be expected behaviour, which happens when ALM is enabled or disabled - the circle of light is just more concentrated with ALM enabled.
Expected Behaviour
Not to see the black moire patterns when ALM is enabled.
Not to see the sunlight shining through the centre of the solid prim when looking underneath.
Repro 2
Rez a tube
Size to: X=0.035, Y=1.5 and Z=1.5
Set Twist to: B=-360 and E=360
Set Hole Size to: X=1.00 and Y=0.50
Set Path cut to: B=0.0 and E=0.5
Observed Behaviour
When ALM is enabled, you will see black moire patterns on the upper and undersides of the prim.
With ALM disabled
Attachments
Original Jira Fields
The text was updated successfully, but these errors were encountered: