The size of the texture of a ribbon dress is 6000*450pix. Poser5 SR3 of this texture size was outside the standard.Restrictions of the maximum size are 4096pix. In my Poser5 Japanese version(v5.0.3 .307), In the case where it is set as cr2, and Mat-pose, it operates normally. However, it cannot edit again in a material room. SR4 is applied to my POSER English version(v5.0.4 .321).The texture of 6000pix was able to be edited in this version. What is necessary is updating Poser5 or just coming it smaller than 4000Pix to carry out texture size, although it is guessed. I want you to try. :)