This is a really simple but amazing mod.
I'm a fan b/c it elevates the strategic decision making for planet selection.
Originally it's just minerals, biome and size but now I could go for a crap planet early that gave a big research boost so I jump ahead fast etc.
The sheer variety of planet specials is also fun b/c some a very rare and are exciting when you find them.
Also that they get applied to asteroids or gas giants will encourage you to selectively compress.

Really well done on this!

I checked that, it need to change negative to positive values and Vice versa (PlanetaryResourceTypes.yaml file, all lines with "populationGrowthPercentualBonus").

In the specials pop-up description on the colony screen, population growth bonuses is displayed with the opposite sign. In other words, the resources that should increase growth are indicated with a minus sign, and negative resources - with positive bonus.
Do they actually count correctly?

it needs to install the mod Custom 5X and DSMP Assets
https://steamcommunity.com/sharedfiles/filedetails/?id=1348895422

I have the same problem, icons aren't showing up.

For some reason, the icons of the new specials aren't showing up. I'm using unofficial code patch 6.1.

Does this work properly with 5X and UCP?

Awesome