The graphics are not accessible by one user group and are therefore taken out of the document. The remaining text will be shown without any modifikationen to the different users, but with a reference to a suitable presentation to the graphics, e.g. the graphics wihtout any chances, the graphics in a different resolution and simplified, a descriptive text, were the graphics used to be. From the users point of view, the document is still accessible, but the base subdocument will shrink to the common material accessible for all user groups. For non-blind users, the subdocument is likely to appear quite 'boring'. I a worse case with a lot of pictures it will become quite inconvenient to follow each link to user depend objects, e.g. images.
Document appears to the users as torn appart.