1. textures glitch

    i've downloaded some trains, when i see it in railyard, it's black (like shadow/shader problems) if i look closer the textures started to appear, what is the problem with the textures? here is the performances (auran trainz diagnostic) ----------------------------
    Auran Trainz Diagnostic Tool
    Version : 1.1
    Compiled on : Oct 30 2008 12:26:33
    System Information
    Time of this ...