This is amazing.. a guy called Tom2050 at CivFinactics has completely converted Civilization 3’s UI, graphics, units, techs, factions etc to look exactly like Heroes of Might and Magic 3!! As a kid growing up in the 90s playing endless hours of Civ and HoMM I always dreamed of some sort of hybrid game that gave me the HoMM experience but in the Civ sandbox world. Looks like this guy has made my dream a reality!

Pics & info etc:
https://blakessanctum.wordpress.com/2019/02/24/3075/

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Agreed! Well I've tried it myself now. I’ve only had a quick look and played a few turns so far but this mod (at least initially) appears as nothing short of a friggin masterpiece! I’ve never seen Civ3 altered so much in my life. Almost every part of the game is changed. New intro ripped from Heroes of Might & Magic 3, new menu image & music from HoMM3 (although I got a black screen at first but clicking seem to stop it), entirely new world/terrain graphics from HoMM3, your palace upgrade screen is now the HoMM3 city screen slowly getting built (different ones for each race if you switch the files), the city sky view screen is now a map of Erathia, all GUI & menus have been given a HoMM3 look (thank goodness as I never liked Civ3’s GUI), all cities/units/techs have been changed to HoMM equivalents, and the Civ3 soundtrack is replaced with HoMM3s. It really feels like HoMM3 but with the freedom and sandbox goodness of Civilization. Also once you go above the original race count you get ‘castle 2’ ‘inferno 2’ etc meaning you can go up to Civ3’s max player count of 31, just imagine playing an epic 31 player HoMM3 style Civ game on a huge map!! :O

I’m gonna play the hell out of this in the near future and will prob do a video too..

I also recently found another HoMM mod for Civ in a German Civ forum. This time it's a HoMM2 mod for Civilization 2. However sadly the guy went and got himself banned lol but thankfully we were able to track each other down on a different Civ forum and he speaks great English (thankfully as I only speak English and bad English lol) so we're now working together on finishing it.

As some have probably already noticed I've made a separate thread here for that where I'll post updates on our progress!
https://www.gog.com/forum/sid_meiers_civilization_series/civilization_2_heroes_of_might_magic_2_mod

It's 20 years too late and it's obviously not going to be as amazing as Tom's HoMM3 for Civ3 mod above but we'll do the best we can and have some fun haha.