[PBR] Shooting range map for Gzdoom addon

-it is obligatory to use a modern version of Gzdoom such as 4.2 or higher.

-it is also recommended to use vulkan or openGL, not softpoly or OpenGL GLES.

Credits to AmbientCG (https://ambientcg.com/) for textures and materials.

other textures (as shooting target) were taken from google images or free stock images.

some PBR materials were edited by me or directly created by me.