HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

In the latest beta (3.808 beta 2) (installed on top of 3.807), with the 32-bit True (stretchable) Nx renderer and xBRZ + Bilinear Sharper / xBRZ + Bicubic SharperX2 filters, the picture will look great.

I tried it. My computer is average by today's standards.
Phenom 960T, 4Gb Ram.

But I didn't like the performance. I felt some lag. Moreover, in windowed mode, the load did not exceed 45%, and in full screen (1062x664) it reached about 80.

Compared to 32-bit True (stretchable), some "lightness" was lost. I played without sound
(I have 3 downloads running, it might be because of that too, but it takes a long time to download, I'll try again later for a cleaner experiment and report back).