In the vanilla game you can from a distance away easily see the bright colors from apple and lemon trees as well as the green of watermelons, carrots and so on.
With the Prehistoric mod these are all now harder to see from a distance and you will need to be close up if you want to see the food is there. This makes it harder to find food.......
Example..... in the picture below you are near an apple tree.
The colors of the environment has now been finalized..... the bright colors you will see in the mod will be some of the dinosaurs themselves.