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Key: VWR-14126
Type: Bug Bug
Status: Open Open
Priority: Major Major
Assignee: Unassigned
Reporter: Zeja Pyle
Votes: 0
Watchers: 0
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1. Second Life Viewer - VWR

Regression: Sculpted Prims: 32 X32 mapping texture are no more generate the correct mesh as before.

Created: 16/Jun/09 09:51 PM   Updated: 18/Jun/09 12:37 PM
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Component/s: Graphics
Affects Version/s: 1.23
Fix Version/s: None

File Attachments: 1. File 1PrimStair_64.tga (16 kB)
2. File one-prim-stair.tga (4 kB)

Environment:
Second Life 1.23.4 (123523) Jun 9 2009 08:32:14 (Second Life Release Candidate)
Release Notes

Built with MSVC version 1400

You are at 263517.5, 255332.9, 377.0 in Nonacho located at sim2964.agni.lindenlab.com (216.82.19.207:12035)
Second Life Server 1.26.4.120562
Release Notes

CPU: Intel Pentium 4 (Unknown model) (2660 MHz)
Memory: 3070 MB
OS Version: Microsoft Windows XP Service Pack 3 (Build 2600)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce 7600 GT/PCI/SSE2
Windows Graphics Driver Version: 6.14.0011.7824
OpenGL Version: 2.1.2

libcurl Version: libcurl/7.18.1 OpenSSL/0.9.8j zlib/1.2.3
J2C Decoder Version: KDU
Audio Driver Version: FMOD version 3.740000
LLMozLib Version: [LLMediaImplLLMozLib] - 2.01.24702 (Mozilla GRE version 1.8.1.21_0000000000)
Packets Lost: 338/123280 (0.3%)
Issue Links:
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 Description  « Hide
Some sculpted prim mapping texture .. 32 X 32 pixels. that was working correctly in the previous version
are now appearing like in distant view. The stair is now looking as a flat bar.

See in attachement
the file one-prim-stair.tga
is 32 X 32 and not work anymore.

you can compare with the same texture expanded in photoshop to 64 X64
and this one works. (see file: 1PrimStair_64.tga)
(of course the streching in photoshop cause a lost of precision)

The probleme is that some products already sold with the 32 X 32 texture are no more render correctly now.

According the wiki... that say that 32 X 32 is supported. (http://wiki.secondlife.com/wiki/Sculpted_Prims:_FAQ)



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Moon Metty added a comment - 18/Jun/09 12:37 PM
Hi Zeja,

The wiki talks of 32x32 vertices, but this is only true for stitching type torus.
Stitching types sphere and cylinder use 32x33, and a plane uses 33x33.
Open-stitched types need that 33rd row of vertices to make the LOD system work.

That's why the wiki continues:

"Q. How big should my Sculpt Textures/Sculpt Maps be?

The recommended size is 64 by 64 pixels. More data is really unnecessary — lower resolutions can result in bad sampling when the Level of Detail (LOD) changes."

=======

You can find how vertices are mapped to pixels here: http://wiki.secondlife.com/wiki/Sculpted_Prims:_Technical_Explanation