All I know is you have to run the game at a higher resolution to make the textures show.
Steps:
1.Go to your ff7 main directory and open ff7_opengl.cfg by dragging it to a blank notepad.
2.You will see this file
# ff7_opengl config file
# use shaders, if available and supported
# turn shaders off to use the OpenGL 1.1 backend
use_shaders = yes
# plugins
# a movie plugin is required, the music plugin is optional, but required to make FF7Music work
movie_plugin = plugins/ffmpeg_movies.fgp
music_plugin = plugins/ff7music.fgp
# vertex and fragment shaders
vert_source = shaders/main.vert
frag_source = shaders/main.frag
# YUV fast path shader
yuv_source = shaders/yuv.frag
# post-processing shader, used to apply fullscreen effects
post_source = shaders/bloom2.post
enable_postprocessing = yes
# display frames per second counter in upper right corner
show_fps = no
# display some real-time debug information
show_stats = no
# set the window size (and fullscreen resolution) of FF7
# 0 means use original resolution (whatever ff7.exe provides)
# preserve_aspect adds black borders as needed to preserve a 4:3 aspect ratio
window_size_x = 1360
window_size_y = 768
preserve_aspect = yes
fullscreen = yes# prevent glitches due to rounding errors by rendering in the nearest (larger, if supported)
# multiple of the original resolution and up/down-scaling
prevent_rounding_errors = yes
# check your driver settings if this option doesn't seem to work
enable_vsync = yes
# limit snowboard, coaster and highway minigames to refresh rate / 2, i.e. 30fps for a 60hz display mode
# vsync must be enabled and working for this to have any effect
minigame_framelimiter = on
# same thing, but for the battle swirl
battleswirl_framelimiter = off
# replace FF7's default framelimiter timer source
use_new_timer = yes
# use a more stable (but less accurate) timer to control FF7's framelimiter
# this option has no effect unless the use_new_timer option is on
use_stable_timer = yes
# allow FF7 to use linear filtering for its textures
# some things look slightly better with this option on, but alot of textures just lose their detail
linear_filter = on
# make all dialog boxes transparent, same effect as the transparent dialog boxes YAMP patch
transparent_dialogs = on
# expand battle viewport to cover entire screen and make the battle menu transparent
new_battle_interface = on
# enable alpha blending for textures without an existing blending effect
fancy_transparency = on
# store external textures in a compressed cache for increased performance
# compression is not lossless, some artifacts may appear when this option is in use
# texture cache does NOT update automatically if the source image changes, however, deleting anything from the cache
# will cause that file to be recreated from the source
compress_textures = yes
# read files directly instead of using LGP archives
# this option requires you to have all your LGP archives unpacked in direct/, with one folder for each archive
# for example; if FF7 is looking for aaab.rsd in char.lgp, this option will make it open direct/char/aaab.rsd instead
# this option should be used for testing only, performance will take a hit
direct_mode = off
3.Change the red text color with your resolution
4.Be careful of what you change there and make backup of the file in case something goes wrong.
5.Good Luck
