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Megaprim sculpties + Alpha -> FPS disaster

Ricky Yates
(searching...)
Join date: 28 Jan 2007
Posts: 809
04-25-2008 12:53
Since a few viewers ago (1.18 or 1.19) I noticed that very often my viewer crawls to a virtual standstill when a large megaprim sculpty (e.g. a rock) is in sight at the same time as alpha textures. Physical proximity does not matter, only whether it is being rendered does.

For example, when I stand on the sky platform at secondlife://Awenhai/159/233/469 I normally have an FPS rate of about 30. When I turn towards the other sky platform directly west of that one, FPS slows to less than 0.3 while "Ping Sim" explodes from 100-200 msec to >2000 msec.

As soon as I turn away from the platform (e.g. facing North), everything is back to normal.

Also, switching off rendering of Simple or Alpha (Ctrl-Alt-Shift-1 or Ctrl-Alt-Shift-2) brings things back to normal.

This happens quite often now, most likely due to the proliferation of megaprim sculpties.

Am I the only one noticing this behaviour? Is there maybe already a Jira tracker open?

My configuration:
CPU: Intel Core 2 Series Processor (1994 MHz)
Memory: 2007 MB
OS Version: Microsoft Windows XP Service Pack 2 (Build 2600)
Graphics Card Vendor: Intel
Graphics Card: Intel 965/963 Graphics Media Accelerator
OpenGL Version: 1.5.0 - Build 7.14.10.4926
LLMozLib Version: [LLMediaImplLLMozLib] - 2.01.14686 (Mozilla GRE version 1.8.1.13_0000000000)
Packets Lost: 8/99121 (0.0%)
Viewer Digest: bb2966f6-cf81-a0de-1e21-dcd21f05428a
Hern Worsley
Registered User
Join date: 11 Aug 2006
Posts: 122
04-25-2008 14:49
Surely if turning Alpha off fixes the issue then the proximity of the megaprim could be coincidence and its the Alpha texture itself that is causing the problem? Try turning off rendering of prims forget the precise term and see if the probs still there if it is then the megaprim has nothing to do with it.
Draco18s Majestic
Registered User
Join date: 19 Sep 2005
Posts: 2,744
04-27-2008 14:01
( ctrl + shift +alt + 9 )
Katier Reitveld
M2 News Manager
Join date: 13 Sep 2005
Posts: 412
05-07-2008 03:29
I took a quick look there myself and personally I think it's more that your graphics card is borderline non-supported.

I live in a cave with multiple mega sculpty rocks around and when I look at the cave from outside there are windows ( hence alpha ) in view too and no slowdown.
AWM Mars
Scarey Dude :¬)
Join date: 10 Apr 2004
Posts: 3,398
05-07-2008 07:50
You have hit the nail right on the head.... INTEL Graphic Chips are NOT supported. The is an OpenGL platform, Intel do not provide high enough OpenGL drivers, nor does the chip support features in the SL environment.
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Ricky Yates
(searching...)
Join date: 28 Jan 2007
Posts: 809
05-10-2008 08:56
Yes, could be that it's my card. I know that Intel cards generally s*ck and that they are not in the recommended list of HW for SL. But looking at the JIRA record I opened, at least one user with an NVidia GeForce 8800 appears to have the same problem. Thus I suspect it's not just the card. In many other places in-world I can run on "High" graphics settings with 15-20 FPS (and that's not just in the middle of an ocean sim :o).

Link to the JIRA record ==> http://jira.secondlife.com/browse/VWR-7072