psatkha
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Yes, I usually use Gigapixel AI, but it doesn't always give good results. I'd like to know what the author of the mod I mentioned above uses for upscaling.Although, I still think that there might be some issue with the export settings. I export in DXT5, using bicubic compression. It feels like it still blurs the image a bit.
For modern systems, DXT5 can be safely used instead of DTX3, as it is essentially an improved DXT3. However, for modern systems and large monitors (24" and larger), the best choice is definitely ARGB 8888! It's perfect for enjoying the game!
С уважением, Psatkha (Псатха) 
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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1
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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1