With this mod You'll be able to change the appearence of the Olorotitan; from a longer and sturdier tail to a remade head and crest.

A full list of the changes:
-Adjusted the crest to properly reflect the shape as shown in the fossil record
-enlarged the crest's top to take into account the keratin growth over the bony interior (in an increase of about 10-20% of the total length) as shown by modern avian counterparts
-elongated the head and depressed the nasal bone
-remade the beak to make the mouth more dinosaur and less horse looking (and to reflect fossil evidence)
-depressed the central area of the skull to evidence the cheeks and teeth (not incredibly notable in-game from afar)
-enlarged the jaw muscles to give them enough mass to chew and move the jaw (Pterygoideus ventralis)
- given the animal a slight dewlap to accomodate the Hyoid bone
-adjusted the spine over the whole body
-enlarged the frontal area of the thorax to give shape to both gastralia and coracoid bones
-evidenced the scapulae and hip bone
-reworked the tail to have the proper curvature, spine and length

Before installing ALWAYS REMEMBER TO BACKUP THE ORIGINAL FILES!

To install:
-go into your game directory
-copy the files into "Jurassic World Evolution\Win64\ovldata\ContentPDLC1\Dinosaurs\Dinosaurs\Olorotitan"
-overwrite all
-enjoy!

To uninstall:
simply copy and paste in the same directory the original files :)