I am constructing a view of some rooms of my flat with Blender 2.79 using the default Blender Render. I am not using any textures so far. Since some time, all new objects in this Blender file render as white in the 3d Viewport when using texture viewport shading (
Alt Z). The image shows how a new cylinder is displayed (after adding it with Shift A):
This effect does not happen for new Blender documents, just for this file. I have checked all settings, and I don't know what can be the cause. As the Blender document format is binary only, there is no way to peek into it and see what might be the cause.
Any suggestions how to fix this problem?