I think something is wrong with my model.
I just downloaded a window model from a random site, in 3ds format. This window lets in light perfectly.
studioslash.ru/window2.rar
But I only have a model in dae format, I work in blender and I can't create a model in 3ds format.
Could you help me and convert my dae model to a 3ds format with a transparent window, as in the window2 model
studioslash.ru/windiw.rar