Hi there,
thanks to Aritz' sample I was able to create a simple bump map for asphalt. It is used for adding some details and enables dynamic track surface. I used some seamless textures and edited them - the file is 1024x1024.
Please feel free to edit or use it!
Maybe some others want to post some samples too?
http://www.zshare.net/download/982463768b818066/
In case it goes offline, here it is as a jpeg file. Remember to save it as tga!
you can make your bump map from your texture in photoshop if you use nvidia you will need the plugin from nvidia, If you use ati radeon then you will have to look for it as i don't use it, but i am sure there is one, this will explian why it is better,
http://www.ozone3d.net/tutorials/normal_map.php
It's not a good idea to use a normal map that was saved as a jpg... The jpg compression will probably make it go a bit wonky!
You will find it as a tga file in the first post. I reposted it as jpg because you cannot atach files exceeding 1024kb limit.
I know it's not the best texture, nor hd or anything. Just a basic sample.