Environment bonus/fatigue checks and ranger feat NATURAL EXPLORER

Is it possible to give certain environments(forest,mountains,cities etc) features like making you walk slower and prolonged minor cold/heat damage(which should check your armor/overall weight), difficulty to spot/listen/search/hide checks etc. While this could give an interesting flavour to the neverwinter various environments,it could also make rangers more…useful in certain areas,giving them the advantage the rest of the party(and particularly their fighter counterparts)dont have. Perhaps this mechanism could introduce the urban ranger class as well as a series of feats like the…Natural Explorer


> Natural Explorer
> You are particularly familiar with one type of natural environment and are adept at traveling and surviving in such regions. Choose one type of favored terrain: arctic, coast, desert, forest, grassland, mountain, or swamp. When you make an Intelligence or Wisdom check related to your favored terrain, your proficiency bonus is doubled if you are using a skill that you’re proficient in.
> While traveling for an hour or more in your favored terrain, you gain the following benefits:
> Difficult terrain doesn’t slow your group’s travel.
> Your group can’t become lost except by magical means.
> Even when you are engaged in another activity while traveling (such as foraging, navigating, or tracking), you remain alert to danger.
> If you are traveling alone, you can move stealthily at a normal pace.
> When you forage, you find twice as much food as you normally would.
> While tracking other creatures, you also learn their exact number, their sizes, and how long ago they passed through the area.
> You choose additional favored terrain types at 6th and 10th level.

Havent moded anything on neverwinter nights yet ,but I suppose the request is doable. Perhaps if someone could give me the basics on how to do it, I could give it a try.

I responded on the old forum.

Probably best not to duplicate on this forum before the switchover.