Texture Problems

[Reiko]

Are all of the texture sizes in multiples of 2s? For example, 1024x512 or 1024x1024 or 2048x2048 etc etc If they are not then they will not show in celestia.

[Fenerit]

Is your graphic card supporting the non-power-of-2 textures? Otherwise do check whether the folder's structure for add-on is conforming something like the sketch below; it depend on OS's.

|_celestia
||_extras
|||_your-add-on
||||_models
||||_textures
|||||_medres <- ("non-power-of-two- folder")

[John Van Vliet]

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[Fenerit]

My question is; is there ever a time you just can not assign a texture no matter how hard you try unless the model is in the original format that it was posted in??? I am trying as hard as possible...

Some 3D modelers now have the option of prevent the changing of textures through passwords unless the 3D model(s) remains into their default proprietary format. For the rest, if you tell us the names of the 3D modelers, maybe someone here can help you with the mapping's procedures.

[selden]

Have you looked in Celestia's console log? Sometimes it contains useful error messages.
Type a tilde (~) to toggle viewing the console log in Celestia's window. That is the only place it can be seen. It is not written to a file.
If you are using a keyboard which supports diacritical marks, you may need to type on the space bar after typing the tilde.

A white texture usually indicates that Celestia was unable to find the texture image file.
All textures for an Addon's models must be placed in that Addon's /textures/medres directory.
In contrast, Anim8or requires that all textures be in the directory which contains the model.
Also, all model textures should be a power of two on a side, since older graphics cards cannot scale non-power-of-two textures. 3D design programs don't care, since they map surface textures in software, not in hardware.

Celestia requires that textures be jpeg, png or DDS/DXT format. No other formats are supported. In particular, do not use BMP. Some BMP image files work, but not all. Celestia's BMP reader is very limited and is not supported.

[John Van Vliet]

--- edit ---

[Fenerit]

...and whether the "white" models have or not pow-of-2 textures; or more exaustively, which graphic card do you use, because in this case the problem should be half-solved by exclusion.

[John Van Vliet]

--- edit ---

[Fenerit]

The LWO or OBJ models are the ones having the most difficulty...

For OBJ model comes from the net, one can take a look inside the file about the matelial used and to see whether the texture's path is correctly specified. Another situatio is whether the file comes without textures; because being a geometric format, the UV mapping couldn't have been accomplished. And whatelse 3D modeler will continue to operate in such a mode (without UV map) until the 3D modellator (the man) will apply it.

[FarGetaNik]

So wether or not Celestia is able to display non-power-of-2 textures depends on the hardware? I thought this was a flaw of older versions of Celestia. I know my system can display such textures, but will others be able to view them? In some cases It is stupid to rescale an image for that reason. When downscaling I loose a lot of detail, when upscaling I unnecessarily increase the file size.