Celestia Forums

My problems concerns earth.

First problem:
Do I have to use the same size in main texture and bumpmap? If I use 8k dds texture and 2k jpg bumpmap then textures aren't covered. Textures are shifted and I have bumps on ocean e.g.
There aren't such problems if I use jpg format for main texture and jpg for bumpmap texture. Even if they are in diffderent size.

Second problem:
If I'm using bumpmapping I have to turn off Vertex Shader because with Vertex Shader mountains are lower and here and there I have valleys instead of mountains.
I have to turn off Vertex Shader if I use big textures (>4k) for main and bumpmap because with vertex shader bumpmapping doesn't work and there's incorrect lighting. Two spot lights on the earth. Simply big mess.

Third problem:
If I use 8k jpg bumpmap and 8k dds main texture I have to wait 5 minutes for scene loading.
If I use 8k dds main texture without bumpmap texture I have to wait about 6 seconds for scene loading.
Will help 8k dds bumpmap texture? I've heard dds isn't good format for bumpmapping textures.

My Hardware: 256MB RAM, GF3 Ti200 64MB.

berdej,

You need to specify which version of Celestia you are running. Upgrade to v1.2.5 if you have not already done so.

lets start with the first one it sounds like you are using a old vresion
upgread to 1.2.5.pre7

It sounds to me like the bumpmap and the dds texture are not based on hte same image. This would also cause a misalignment of the texture with the bumpmap.

Thanks.
I use version 1.2.4.
I will try with celestia-win32-1.2.5.