New texture loading bug

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Cham M
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New texture loading bug

Post #1by Cham » 18.05.2007, 02:55

I've identified a new issue with texture rendering. It's occuring since less than a week with my builds from CVS. Each time I restart Celestia, the Earth is having some textures problems as shown below. The problem seems to go away if I move a bit around Earth, so it's not a permanent problem under a single session. The shape of the "wrong patch" is variable with each launch and appears to be correlated with Earth's rotation relative to the date and time.

I'm also experiencing a similar problem with Jupiter, which is showing some patches full of stars, the first time I see the planet after each Celestia restart. As soon as I move around, the problem disappears. This problem seems to be related to the texture loading.

I'm using a 4k PNG texture for the Earth and a 4k DDS texture for Jupiter. Both are using a cloud layer. I can't tell if this is related to the problem.

Anyone able to confirm this ?

Image

Image

Image
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Post #2by Cham » 18.05.2007, 03:03

Here's what I get if I restart Celestia without the cloud layer enabled :

Image
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Post #3by Cham » 18.05.2007, 03:14

I just tested the problem with other rendering paths. It doesn't happens under the old standard OpenGL path. The bug only occurs when I use the OGL2 path. It's occuring even without the cloud layer activated. Like I said in my first post above, the problem disappears as soon as I move a bit around the planet (Earth or Jupiter).
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Post #4by tech2000 » 18.05.2007, 03:20

Image
Cham:

Excuse my bad sence of humor... but it looks like earth just smiles at you. :wink:

Bye, Anders.
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Post #5by Johaen » 18.05.2007, 03:42

tech2000 wrote:Image
Cham:

Excuse my bad sence of humor... but it looks like earth just smiles at you. :wink:

Bye, Anders.


ftw!
lol.
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Post #6by Darkmiss » 18.05.2007, 12:04

Johaen wrote:ftw!


American slang for somthing ?
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Post #7by tech2000 » 18.05.2007, 12:30

Darkmiss wrote:
Johaen wrote:ftw!

American slang for somthing ?


F**k The World

Regards, Anders
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Post #8by dirkpitt » 18.05.2007, 12:53

:lol: :lol: :lol:
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Post #9by ElChristou » 18.05.2007, 13:09

tech2000 wrote:Excuse my bad sence of humor... but it looks like earth just smiles at you.


:lol:
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Post #10by Johaen » 18.05.2007, 14:07

tech2000 wrote:
Darkmiss wrote:
Johaen wrote:ftw!

American slang for somthing ?

F**k The World

Regards, Anders


ftw = For the win. lol.
http://en.wikipedia.org/wiki/List_of_Internet_slang_phrases#F
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Post #11by dirkpitt » 18.05.2007, 15:16

Laughing aside, I can't duplicate this issue (with, or without virtual textures, DDS, PNG etc). Actually, to me it looks more like a geometry clipping or depth-related problem because you can see through Jupiter.

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Post #12by Darkmiss » 21.05.2007, 15:00

Johaen wrote:
tech2000 wrote:
Darkmiss wrote:
Johaen wrote:ftw!

American slang for somthing ?

F**k The World

Regards, Anders

ftw = For the win. lol.
http://en.wikipedia.org/wiki/List_of_Internet_slang_phrases#F


For the win! huh... okay, and thats further American slang for somthing?
That picture is for the win... hmm! still don't get it :roll:
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Post #13by Johaen » 21.05.2007, 15:59

Darkmiss wrote:For the win! huh... okay, and thats further American slang for somthing?
That picture is for the win... hmm! still don't get it :roll:


It means it's good. It's awesome. It wins.

It's more internet slang than american slang. You normally wouldn't speak it unless you're actually making a joke about internet slang.
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Post #14by Cham » 21.05.2007, 16:54

Guys, thus is all OFF TOPIC ! Stay on the topic please !
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Post #15by dirkpitt » 24.05.2007, 03:37

Ok, from what I've heard from Cham directly, this is related to the use of VBO on planets. VBO is disabled by default for planets, but I was enabling it for some of my recent unofficial builds and it seems to behave badly on Cham's graphic card (x800?) It's not certain yet whether this is a graphic driver bug or not, but I won't be reenabling the planet VBO feature anytime soon.
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