i made a new texture
how do make it "sand" instead of solid ?

Find the materials.txt file (if you have retail I think it's in the sound folder)...that should give you enough info to figure out how to add your new texture in.

so i need to enclude it in the map too ??
so if other plays the map they will see
the sand too

yeah i think so.

All I say is. If you supply a new materials.txt with your map I won't be using it.

This assumes I download and like playing your map :D

My point is, best not to mess with the standard instalation files as other mappers can do the same thing and overwrite the same file meaning your textures won't work the way you want them to.

One way to accomadate this would be for the Client to manage the file themselves by editing it to have all the different custom textures from all the maps that use the file.

But that ain't gunna happen ... is it?

but what then ???
other custom maps with new textures workes just fine ??
what have the mapper done to make his texture work ?

what you can do is this
either include a readme instructing people to write your texturename into their materials.txt
or
rename your texture to one that is already in the stock materials.txt file and do a -wadinclude with your wad
there is only one problem with the latter, if someone is running a different map before they play yours, and it has a texture with the same name, hl will "remember" the old texture on a map change and people will see the other texture not yours ingame

lol