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Poppytat Sodwind
Registered User
Join date: 29 Nov 2006
Posts: 52
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11-14-2007 08:40
hi, i have been having this problem for a while and decided to ask here as it is beginning to bug me...when i place some textures (mainly ones i have uploaded as i dont use others much) i am finding that if the textured object is looked at from certain angles it disapears into whatever is behind it.
does anyone know how to stop this from happening?
cheers
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Michael Bigwig
~VRML Aficionado~
Join date: 5 Dec 2005
Posts: 2,181
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11-14-2007 08:45
Perhaps it's an alpha channel issue.
When you look through several stacked textures that are alpha channels, OPenGL will go all wonky trying to sort them...
There is no way around this.
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~Michael Bigwig __________________________________________________Lead Designer, Glowbox Designs 
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Chosen Few
Alpha Channel Slave
Join date: 16 Jan 2004
Posts: 7,496
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11-14-2007 09:00
Make sure you're only using 32-bit textures where necessary. Only save as 32-bit when you absolutely, positively, 100% need transparency in the image. Otherwise, use 24-bit textures at all times.
As Michael said, the phenomenon you're describing is called the alpha sorting glitch. When two or more surfaces with 32-bit textures overlap in close proximity, the renderer has trouble determining which one to draw "in front". This affects all OpenGL applications, including every 3D video game in existence, high end 3D modeling applications that cost thousands of dollars, and everything in between. SL is no exception.
The solution is to be aware of it, understand what causes it, and build around it.
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Land now available for rent in Indigo. Low rates. Quiet, low-lag mainland sim with good neighbors. IM me in-world if you're interested.
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Poppytat Sodwind
Registered User
Join date: 29 Nov 2006
Posts: 52
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11-14-2007 09:58
ok, thanks,
example, the wall is a jpg, no transparencies there, the fireplace surround is partly alpha channel saved at 32bit. so really it is only one texture with transparencies which disappears into the wall...the same thing happens with purchased plants which have transparencies, from certain angles they just vanish!
also pictures placed with a frame...the frame stays but the picture disappears...i can have the picture 10 ft from the wall and it still disappears...
i kinda of get what you are saying...it sucks...its tough...i guess i have to live with it...lol...
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Ceera Murakami
Texture Artist / Builder
Join date: 9 Sep 2005
Posts: 7,750
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11-14-2007 11:06
Your wall may have no visibly transparent parts, but if it was saved as 32-bit, it still gets treated as transparent.
Turn on 'Highhlight Transparent" in the View menu. All 32-bit textured surfaces will be tinted red.
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Sorry, LL won't let me tell you where I sell my textures and where I offer my services as a sim builder. Ask me in-world.
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Tarina Sewell
Just Browsing Thank you
Join date: 20 Jul 2007
Posts: 2,180
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11-16-2007 13:44
WOW, I was going to ask this same question!! I figured it was a trasns issue, but thought "I" was doing something wrong..
Thanks for asking this Question, and thank you for answering it!
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