Mesh Building 2013-3

Drongle McMahon is into mesh and does lots of experimenting. When I see his posts in the SL Forum I usually check them out to see what he has to say. I learn a bunch. The more I learn the more I cut from the cost of my mesh objects. So, while this article may get geeky it can save you Lindens.

Second Life Mesh Physics Problem

Aquila Kytori’s Illustration of Drongle’s Experiment

Recently he has been seeing oddities in the physics model’s cost affect on items using prim type physics, which you may need to use for some objects like walls with doors. There is a thread titled: Triangle physics weight – Cautionary tales, episode 2.

His post points out some problems with physics models and how one of his went from a Land Impact (LI) of 7,671 to 0.5… why is worth knowing and understanding.  Continue reading

Second Life Viewer Statistics PING

If you have looked at the Viewer Statistics (Ctrl-Shift-1), you have likely looked at PING. The term comes from the use of echo location in submarines and other marine uses. The active echo locators make a distinctive PING sound as the send a sound wave out. Electronics hear the echos coming back and create picture for human use.

Lots of PING – Image by: mknowles Flickr

When testing network connections we use a ping. It is actually a command to send a network data packet to a remote location and request a packet be sent back. The travel time tells us how well the connection is working.

What most people likely don’t think about is whether the Viewer’s PING is the same as the PING our operating system generates. For your information it isn’t.

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#SL Advanced Modeling Tips

3D modeling is sort of a new think in Second Life™. Now that 3DS, Blender, Maya, and SketchUp models can be imported we have a whole new realm of knowledge and learning to deal with. One of the tough areas is finding ways to handle the Level of Detail (LoD) aspects of modeling. LoD has a huge impact on Land Impact (LI) costs. So, we have lots of incentive to understand the concept.

3D Modeling Tips: Level of Detail

I watch for ideas and tutorials that will help me with that challenge. Indigo Mertel Plurked about a modeling expert giving out tips on 3D modeling LoD. So, I’m down with that. Her article and link to the tips is here: Expert games tips: Generate more effective level of detail models.

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Interesting Debug Settings

Strawberry Singh has a post on her blog titled Debug Me. Whether you follow her blog or Plurking you know she does some great pictures, which is an understatement. In Debug Me she is explaining some of the Debug Settings she uses to improve her pictures. You’ll have to visit her site for her settings. I’ve written a little about the settings from a performance aspect.

  • RenderGlow – This is mostly a visual change with little impact on render time. The viewer has a number of glow settings that do affect performance. So, you can control glow in most any scene of visual and performance aspects. Use your web browsers page search/find on the Debug Settings page to find them all. Some improve the rendering of glow at the cost of a slower render, but it is not a big performance factor.
  • RenderVolumeLODFactor – This changes how objects in SL are rendered. It has an impact on performance, but the amount of impact depends on the scene and camera location. So, you won’t see a 1-to-1 relationship between the setting value and performance. Berry gets good results with the value high, but that is in photos. If you are exploring SL, a setting of 1 or 2 is going to improve rez time and FPS. But, you will see the distorted sculpties and mesh objects that change shape as you get closer or move away. Higher values stop that changing. For photos a large setting can solve the problem sculpties looking funny.

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Viewer Performance

A resident by the name of Nala Spires did some testing to see what affects the SL Viewer performance the most. You can read about his test and the results here: CPU / RAM/ VGA what sl likes More ? ((attempting to answer that ! ))

Nala Spires

She used this viewer: Windows 7 professional 64bit firestorm Viewer v4.1.1.28744

She also used FRAPS to benchmark the performance. FRAPS slows my system so I would expect the numbers to be a bit lower than normal.

A lot of the numbers make no sense to me. Since it is FRAPS I assume they were FPS numbers. But jumping around between 200+ and 20 seems a bit beyond anything that makes since to me.

I did read her Conclusions and they are interesting. Nala concluded  memory speed had a significant impact on performance. Buying FASTER memory did the most for performance.

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#SL Viewer Problems

If you haven’t run into viewer problems, you must be new. A couple of problems have come up recently. Readers have asked or sent me IM’s on them. So, I’ll mention them because they seem to be biting some people. Also, because when I started experimenting I started running into problems.

Second Life Viewer 3.3.3

In most day-to-day use you are not going to run into these problems. But, it is depressing when you do.

Groups

You probably already know large groups, over 5,000, can be a problem and over 10k are a problem. They can be slow to load and nearly, if not completely, impossible to edit and work with.

One of the problems that seems a bit worse is opening a large group can lock up the viewer for over a minute and reportedly in some cases 3 or 4 minutes. I saw my viewer locked up while opening the Phoenix/Firestorm Support group, the largest group of which I’m a member.

See VWR-29124- Severe performance issues on 3.3.2 (258114) Release and 3.3.3 (259197) Beta in “Add scroll list item.” Thanks to Stephan Gaudio for pointing it out.

You’ll notice we currently are past those versions. But, I’ve run into the problem with 3.3.3 (260300) Jun 21 2012.

Baker Linden has been working on the problem for a couple of weeks with some help from other Lindens. But the previous article on Chnages Coming to SL shows there is lots going on. So, I suppose some of of the changes, like fixing groups, are shooting at moving targets.

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