HaloMods "Classic" Read-only Archive

when i copress the structure it says 'random_floor'(bitmap name) choose shader: 1:shader_environment
2:shader
... and i dont know what to do can someone help

If I understand your error right you dont have a shader created for one of your bitmaps you used in your level creation. You have to create a shader enviroment for that shader and then that error will go away.