A THREAD FOR NEWCOMERS!

Good day, I've encountered the following problem while setting up the HD mod for Heroes of Might & Magic III - Complete (GOG version). For some reason, the stretch filters aren't working for me, or their effect is barely noticeable. I've launched the game in (stretchable) 32-bit GDI and OpenGL by Verok modes, at a resolution of 1280x720 with 16 processor threads (if possible), tried different initial sizes, used windowed/fullscreen modes, but I haven't noticed any significant improvement. And I might have left it at that, but after looking at the graphics in comparison with other people, I noticed that their heroes with the HD mod look much more contrasting, with increased sharpness and saturation (the visual improvement is very noticeable). Initially, I thought I could simply increase the initial size to match my monitor's parameters and adjust the contrast in the tweak settings, which made it a little better, but... the interface is too small in 2K, and I couldn't achieve a significant improvement in the graphics. Now I don't understand what the problem is. If the HD mod wasn't working, then other settings and quality-of-life features provided by this mod would simply be missing. I tried switching filters in the game itself using Ctrl + and -, but I noticed that the most acceptable result is achieved without any filter. Or do I need to install additional plugins on top of that?