how to make and add custom textures to UZB

[whatdoitypehere75]

I have a picture I want to make the background of my level, but I don't know how to import it. I have Slade and UZB, but I don't know what type of file it needs to be and how to import it. can anyone help?

 

[DylanDude]

Custom textures tutorial (SLADE) - SRB2 Wiki

wiki.srb2.org