no textures displayed

[Castor]

Hi,

I've just downloaded CELESTIA for window XP.
I have started the demo script.
The image of the sun is ok, but for the others planets it seems that there are no textures :
Earth is just displayed as a red circle, same for saturn, the moon...
What is wrong ?

[selden]

A body is drawn red by Celestia if an error message is returned by the vertex shader compiler of your computer's graphics driver. You can verify this by typing a Ctrl-V to Celestia several times, stepping through its Render Paths. Celestia's Basic and Multitexture Render Paths don't use vertex shaders and thus will not draw red planets. A common problem is that older drivers don't recognize vertex shader comments which are required by current drivers.

Having obsolete drivers is a common problem. Updated drivers are available for free download from the Web site of the manufacturer of your graphics hardware. The versions provided by Microsoft are obsolete and buggy. If you update DirectX, you need to update the drivers again from the graphics manufacturer.