Because:

(TW: smoothening of beautiful pixel art🤢🤢🤢)

To remove the filtering you'll have to mess with the game files.
For me the game files are located here:

1. Delete all .tpk files inside the content\BATLE folder (5 in total)
   
2. Delete the pgmdt_pgmdt__spriteinfo.bin file inside the content\BIN folder (1 in total)
   
3. Delete all spriteinfo.bin files inside the content\FIELD folder (1434 in total)

If you plan on reverting the changes for some weird reason you can always right click the game in your Steam Library and click "Verify Integrity of Game Files" files to redownload the missing ones. Imagine creating backups pff.

Your BATLE, BIN and FIELD folders should contain 2665 files after this process:

After this you may head to
(just type/paste it into your windows explorer and hit enter)
Inside this folder you'll find config.ini which you can edit with whatever editor you like.

Set the "video_antialiasing" variable to 1 to disable AA to prevent graphical glitches.


If you'd like you can also set the resolution to 4:3 WHICH the launcher doesn't allow for some reason! (Probably because they couldn't be arsed to remove the blurry edges from the fmvs LOL)

EDIT:
someone let me know that you don't need to modify the config.ini file if you're just looking to change the resolution:

Diposting pertama kali oleh Albus Percival Dumbledore:

Thanks for the guide, really appreciated.

Just a small note, you don't need to modify the config.ini file if you're just looking to change the resolution. You can manually erase and type in the resolution you want via the pre-launch settings and it'll work.

Thanks!





To achieve this just set the X and Y video resolution variables to your desired resolution, e.g.:

If you're not on an AMD GPU you might encounter graphical glitches on black textures.

But fret not, some dude in the comment section found a solution for that. Added edits for it!

As to why it's only affecting NVIDIA GPUs is currently unknown.

I've played through the entire game on a NVIDIA GPU (RTX 3070) so I've encountered the glitches on the black textures which got kinda bad at some parts. Here's how bad it can get:

You don't encounter them on AMD GPUs as far as I'm aware (tested on RX 580) so if you can't run the game on AMD GPUs you're out of luck.

IMHO the game looks infinitely better without the filters that I'm willing to take that con but in the end it's up to you to decide!



EDIT:

According to DkZ in the comments it might be worth a try to to set the game to energy saving mode to remove the texture errors on NVIDIA GPUs:

Diposting pertama kali oleh DkZ:

I found a way to make it work without texture errors on Nvidia gpus, I don't know it's running on nvidia card, but it worked. as the game does not require a powerful gpu, intel integrated cards work without a problem.
1. Just go to the windows settings and look for: Graphics Settings and add the game executable.
2. in options you switch from high performance mode to energy saving.
that way when I opened the game it was without the errors in the dark textures.
apparently it works, at least for me.

EDIT2:

According to Scouali in the comments there's a way to get rid of the flickering:

Diposting pertama kali oleh Scouali:

For Nvidia users who don't want to remove the filter on the terrain to avoid weird flickering but still want to remove it from sprites, you can follow the guide but just dont touch the "maps__spriteinfo.bin" files from the "field" folder.
That way all the terrain will still have the filter applied to it so no flickering but the sprites should be ok.

Big thanks to jblackan for figuring out all this filter removal business Link to original thread

Did I mention that this version is the best one for Speedrunners since it's the fastest one? There's also some cool PC-specific bugs which only drive the fastest possible time even lower!


Link to the Grandia Speedrunning discord for those who're interested in learning the HD Remaster exclusive Glitched any% category run: Discord invite[discord.com]


Enjoy this game! =)

love yourself, take care