[Chimera-users] << Rendering proteins with Chimera >>

Hi all, As a Chimera new users, I notice that the proteins are rendering different depending on the program they where prepared. I used the preset to render them. I have a protein with all residues in different color and the other protein is rendered in a single color. My question is: this is a problem of Chimera or it is a problem with the protein file? Regards, Hatuey