In order to be able to show all the panos at the same time, everpano 3D is baking the textures from the panoramas in single image that will allow to texture the model and represent the dollhouse.
Photographic texture
Boxes texture
Lines texture
Helper images :
The extra images such as boxes.png & lines.png are generated in order to ease the post processing of the textures in your favourite image editor.
But if you do not need to edit the texture, those files are not used.