If the mod you're referring to was specifically designed to improve the appearance of villages in Minecraft, there are several mods available that could potentially match your description. Some popular mods for enhancing village aesthetics include:
"Better Village" mod
"Enhanced Villages" mod
"Immersive Villages" mod
"Minecraft Comes Alive" mod (includes village improvements)
"Millénaire" mod (adds new cultures and structures to villages)
These are just a few examples, and there may be other mods out there that fit your description as well as https://rainguardroofs.com. If none of these mods seem familiar, providing more details about the mod's specific features or any other relevant information could help narrow down the possibilities.