[#VWR-716] Particles -> Inappropriate Alpha Sorting - as of 1.15.x

1. Second Life Viewer - VWR

Particles -> Inappropriate Alpha Sorting - as of 1.15.x

Created: 09/May/07 10:27 AM Updated: 22/Sep/09 11:03 AM

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Component/s:

None

Affects Version/s:

None

Fix Version/s:

None

File Attachments:

None

Image Attachments:

1. particlesalphasorting.jpg
(222 kB)

2. Snapshot_032.png
(1.74 MB)

Environment:

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Second Life 1.15.0 (2) Apr 24 2007 17:21:17

You are at 265575.9, 316103.7, 301.1 in GT HQ located at sim2023.agni.lindenlab.com (64.129.40.27:13006)

CPU: AMD K7 (Unknown model) (1998 MHz)
Memory: 512 MB
OS Version: Microsoft Windows XP Service Pack 2 (Build 2600)
Graphics Card Vendor: ATI Technologies Inc.
Graphics Card: RADEON 9600SE x86/MMX/3DNow!/SSE
OpenGL Version: 2.0.6287 WinXP Release
LLMozLib Version: 1.1.0 (Mozilla GRE:1.8.0.10_0000000000)
Packets Lost: 0/2286 (0.0%)
Viewer Digest: d41e9967-bd06-7599-cf20-d339bf6c1dee

Issue Links:

Duplicate

This issue duplicates:

~~VWR-27~~ Prim textures overlap strangely when transparent textures applied

Relates

This issue Relates to:

~~VWR-565~~ Particles -> Missing -> as of 1.15.x

~~VWR-2164~~ Particle Alpha transition is done incorrectly

~~VWR-418~~ Particle burst quality fades

Last Triaged:

21/Sep/09 03:29 PM

Description

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(Requested disambiguation of ~~VWR-565~~)

Description: Two particle sources in near proximity. Particle source that is closer to the camera, renders particles over particle source further away. That would be "normal".. however.. when flames and smoke are created, as in this image, the flames get swallowed by the smoke.

Appearance is not consistent, but more often than not, the particle sources in "near proximity" choose their alpha sorting poorly.

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Comments

Change History

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Blakar Ogre added a comment - 10/Aug/07 12:07 AM

If anybody can offer a solid repro for this to me I'll fix it.

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Blakar Ogre added a comment - 15/Aug/07 05:07 PM

I linked this with ~~VWR-2164~~ because the visual impact of that particular bug might influence what we're experiencing here. Off course no way to tell without a repro particle script for this bug.

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Alexa Linden added a comment - 31/Aug/09 03:29 PM

Are you still experiencing this problem?

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Winter Ventura added a comment - 31/Aug/09 03:55 PM

Yes.

2 and a half years later, this problem still exists. I have stoped developing items using paricle trails simply because alpha sorting has been so badly broken since 1.15

CPU: Intel Pentium III/Pentium III Xeon (0.25 micron process) with external L2 cache (2999 MHz)
Memory: 4093 MB
OS Version: Microsoft Windows Vista Service Pack 1 (Build 6001)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce 9800 GT/PCI/SSE2
Windows Graphics Driver Version: 8.15.0011.9038
OpenGL Version: 3.1.0

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Alexa Linden added a comment - 14/Sep/09 02:22 PM

Hi Winter, is it possible for you to drop a test item on me that displays this problem so I can pass it on to QA?