Celestia Forums

Hi guys, I have a problem with the texture of the software at the current version 1.5.1
I followed all the instructions in the FAQ's and I've updated my graphic card driver to the latest version but the problem still remains.
Practically my problem is well showed in this picture:



and this is my system configuration:
Laptop computer ACER Aspire 3000 with Mobile AMD Sempron 3100+ 1.80GHz
1.00 GB RAM
Video Card Sis AGP with 128MB

and these are the specifications provided by celestia OpenGL information:
Producer: SiS
Renderer:760 VGA
Version: 1.3.0
Max textures togheter:4
Max dimension of the textures: 2048
Gamma of point dimensions: 0.500000 - 10.000000

Supported Extension:
GL_ARB_depth_texture
GL_ARB_multisample
GL_ARB_multitexture
GL_ARB_point_parameters
GL_ARB_shadow
GL_ARB_texture_border_clamp
GL_ARB_texture_compression
GL_ARB_texture_cube_map
GL_ARB_texture_env_add
GL_ARB_texture_env_combine
GL_ARB_texture_env_crossbar
GL_ARB_texture_env_dot3
GL_ARB_texture_mirrored_repeat
GL_ARB_transpose_matrix
GL_ARB_vertex_program
GL_ARB_window_pos
GL_EXT_abgr
GL_EXT_bgra
GL_EXT_blend_color
GL_EXT_blend_minmax
GL_EXT_blend_subtract
GL_EXT_compiled_vertex_array
GL_EXT_draw_range_elements
GL_EXT_fog_coord
GL_EXT_multi_draw_arrays
GL_EXT_packed_pixels
GL_EXT_polygon_offset
GL_EXT_rescale_normal
GL_EXT_secondary_color
GL_EXT_separate_specular_color
GL_EXT_shadow_funcs
GL_EXT_stencil_wrap
GL_EXT_swap_control
GL_EXT_texture3D
GL_EXT_texture_edge_clamp
GL_EXT_texture_env_add
GL_EXT_texture_env_combine
GL_EXT_texture_env_dot3
GL_EXT_texture_lod_bias
GL_EXT_texture_object
GL_EXT_vertex_array
GL_KTX_buffer_region
GL_NV_blend_square
GL_SGIS_multitexture
GL_SGIS_texture_edge_clamp
GL_SGIS_texture_lod
GL_SGIX_depth_texture
GL_SGIX_shadow
GL_SUN_multi_draw_arrays
GL_WIN_swap_hint
WGL_ARB_extensions_string
WGL_ARB_pbuffer
WGL_ARB_pixel_format
WGL_ARB_render_texture
WGL_EXT_extensions_string
WGL_EXT_pixel_format
WGL_EXT_swap_control



you know a way to solve this problem? Thanks for all the help will you provide.

The two different surfaces look like the Earth specular texture (yellow and black in your screengrab) plus the Earth's surface texture (blue and green). Celestia comes with them in the same surface texture file, earth.png: its alpha channel is used to store the specular texture. I'm wondering if this is resulting in some graphics confusion in your hardware.

As a test, you might try renaming Celestia/textures/medres/earth.png to be not_earth.png
and then copying Celestia/textures/medres/mars.jpg to Celestia/textures/medres/earth.jpg
(Celestia always selects the png image instead of the jpg image if both are there.)

Then when you restart Celestia, Earth should look like Mars. You may need to type capital R or lower case r several times to select the medres folder.

After you've done this, does the Earth look like Mars or is it messed up in the same way as now?

.

I did every step that you told me...but after selecting the "medres" the screen is still messed up as you can see in this picture:



Do you have any other suggestion?

Ouch.

How about Jupiter? what does it look like?
(one way to go to it is to type a 5 using the numbers above the main keyboard and then a G)

I think Celestia's Jupiter is the object with the fewest textures applied to it.

Three other things to try, all of which are mentioned in the FAQ:
1. switch to Basic render mode. Type a Ctrl-V several times until you see Basic (or the italian equivalent) flash on the screen. Does that help?

2. disable 3D hardware acceleration entirely. It'll be much slower, but does it look OK?

3. disable vertex shaders by editing celestia.cfg and removing the # which is at the start of the line
# IgnoreGLExtensions [ "GL_ARB_vertex_program" ]

selden wrote:Three other things to try, all of which are mentioned in the FAQ:
1. switch to Basic render mode. Type a Ctrl-V several times until you see Basic (or the italian equivalent) flash on the screen. Does that help?

Yes this helps a grat lot, now I see all the planets with the textures in the right way.
I checked the FAQ's but I really miss this one!!! Sorry.

Thank you very very much for your advice.
"Ciao" Giuseppe

I'm glad to know that Basic works for you.
Does Multitexture work, too?

I am unhappy to have confirmed that there is an incompability with VIA graphics chips. Other people have had similar problems with them. I fear there may not be anything that can be done in Celestia. The author of Celestia's graphics code, Chris Laurel, will know for sure. He's not reachable right now, though.

selden wrote:I'm glad to know that Basic works for you.
Does Multitexture work, too?

I am unhappy to have confirmed that there is an incompability with VIA graphics chips. Other people have had similar problems with them. I fear there may not be anything that can be done in Celestia. The author of Celestia's graphics code, Chris Laurel, will know for sure. He's not reachable right now, though.

Yes, Multitexture works well, so I can see also the dark side lights on earth for example.

For the rest, for me the program is spectacular as usual, but if mr. Laurel can fix the other problem in the new 1.6.0 version, it will be more spectacular.

Have you tried v1.6.0 RC1?

I don't think this kind of problem can be fixed easily.
If it isn't fixed in RC1, then it will probably have to wait until v1.6.1 or later.
The biggest known problem with RC1 is that some files are missing, but the program is OK.

No I haven't still tried version 1.6.0 RC1...i will tomorrow to see if there is the same problem.

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