The version(s) of sponza.obj in the repo do not match the accompanying copyright.txt, which states that the "long untextured banner floating in the middle of the atrium that appears in the file but in none of the published images of the model" has been removed. The banner appears to be present in the (larger) obj file in this repo. It looks like the version you intended to include can be found at https://github.com/man-in-black382/PathFinder
The version(s) of sponza.obj in the repo do not match the accompanying copyright.txt, which states that the "long untextured banner floating in the middle of the atrium that appears in the file but in none of the published images of the model" has been removed. The banner appears to be present in the (larger) obj file in this repo. It looks like the version you intended to include can be found at https://github.com/man-in-black382/PathFinder