Random mesh upload glitches

[Maylee Oh]

Hello everyone !

So I'm experimenting many issues with my mesh works since the very beginning (august 2011), I hope someone will be able to enlighten me in here !

90% of my mesh uploads have random glitches such as missing/untextured faces. The most annoying is that I can reupload the exact same fil three times in a row, the glitches will be somewhere else on the mesh and even with some luck, the mesh can magically appear flawless (still using the same file without editing it). I feel like playing lottery each time I upload something, since flaws are never displayed in the preview window.

Here is a sample :

First upload : there is a flaw behind my model, front is ok.

http://i43.tinypic.com/2gx3das.jpg

Second upload, same file (I deleted the previous *.slm in the folder) a hole appeared on the torso, texture glitch on the back :

http://i40.tinypic.com/qx5kjr.jpg

Third upload, same file, (deleted *.slm as well) everything's good :

http://i44.tinypic.com/166ao41.jpg

What I'm using :

Blender 2.59 64bits (tried 32 bits didn't work any better), tried both Blender collada export/SL collada plugins. Jass/Blender 2.49 collada 1.4 not working either.

SL viewer 3.2.5, but I tried several builds and viewers, still having the issue.

My mesh is made of 14000 triangles (7000 quads).

What I tried, and what i'm aware of :

The normals are all facing the right side (checked and rechecked them with blender display), I recalculated outside, applied scale/rotation. All my vertices belong to bone groups and I don't have any 0 weighted vertex (checked with 2.49 clean meshesscript/check for unweighted vertices). I don't have any double vertices. I'm using avatars.blend from standard sizing package provided  by Lelutka/Mon tissu http://dl.dropbox.com/u/6003454/Standard%205%20sizes.zip wich are working great for other designers.

I also tried to convert my quads to triangles before importing it to SL (since it looks like SL viewer is unable to convert my mesh correcly), the two uploads after were flawless, then the glitches came back on the third upload.

I rigged my mesh using the 2.49 bone weight copy script and some manual blur and it moves correclty with the skeletton.

I still think the trouble is coming from my mesh, maybe the way I modelized/rigged it but I'm running out of ideas for now :(

Thanks for reading, waiting for your feedback, any idea is more than welcome !

 

 

[Drongle McMahon]

Difficult. Is it just one materials? Is the texture alpha (32 bit)? Could it be that there are some duplicate faces that exhibit the alpha sort problem occasionally depending on exact point of view? It would ba hard to see them in Blender, and they wouldn't go with remove duplicates unless the vertices were close enough. It looks like a UV map problem, but obviously the UV map is mostly OK. The homogeneous areas vcould result from UV faces accidentally squishes to zero dimension (so all coloured with the same pixel), but that doesn't fit with the same file working the next/presvious time. That's all I can think of for now.

[Maylee Oh]

Thanks for your reply !

Yes it's only one material and the texture has no alpha (it's 24 bits) and the glitches are not changing with the point of view Also the holes are visible even on the untextured model, not the plain faces though.

[Drongle McMahon]

Could it be a download problem? Flaky connection? Packet loss? (or are mesh error-checked http?) It could be in your cache so that it is always the same until you make a new upload which has a new id and a new download. But that would affect other things too. Did you try clearing the cache? Do you know if other avs see the same imperfections that you see? (in which case it's in the stored asset and nothing to do with download).

[Maylee Oh]

Yes other avatars see the same thing sadly

[Maylee Oh]

Hello again !

So here is today's summary :

I tried to export and upload my mesh on my laptop instead of desktop computer : same glitches, even worse.

I tried uploading using last kirsten build wich works pretty fine for a friend of mine : broken mesh again.

I sent my collada and blend file to a friend who tried to export/upload it herself, everything worked perfectly.

I tried to upload rigged mesh of hers, they ended up broken uploding in sl using on my computer.

I really have no idea what's going wrong, seems like something's wrong with my computer or OS.

I'm using Windows 7 64 bits (but the friend who uploaded succesfully is also on Windows 7 64 bits) , both Nvidia cards on my two computers.

I'm going to try on another computer today, i'll post the result laters.

Thanks for reading again <3

[Porky Gorky]

You might want to check the stability of your internet connection, I remember having a similar issue when uploading to Blue Mars a few years ago, Turned out I had bad packet loss on both upload and download due to old antiquated cable running from my house to the main cable line. A friend of mine had the same problem a few weeks back when trying to stream live a BF3 game. His cable company just upgraded the cable and his connection is perfect now.

There are websites and free tools out there that can test your connection stability over a sustained period.

One thought is, if you are using a wireless connection then try eliminating that and plugging in. If you are already using a wired connection then maybe try uploading on a different connecting altogether and see if that helps.

[Maylee Oh]

Oh thanks, that's an interesting idea, I'm not using wifi but wired network though, but since my internet is quite slow (countryside net) that's very likely, I'm going to check this !

[summse Sands]

Have same problem,

tried all what listed here to fix the problem.

Any ideas how to fix it?

Thanks