by Abel » Tue Aug 16, 2011 5:28 pm
JPG should work like any other image format, it would be good to figure out what causes the problem as others might suffer from it too, now or in the future. The following information could be helpful:
-where did you get LuxRender? do you know the exact version you have?
-where did you get LuxBlend?
-which version of Blender do you have and how have you installed it?
-when using other image formats, do the textures work in the preview? if possible, please try png and tif
-have you tried different material preview shapes, like the sphere and the cube?