Could someone tell me why this is happening?

Animation of my graduation project rendered in Vred and edited with PremierePro.

Modeling in Alias and rendering in Vred.

SeaOrbiter designed by Jacques Rougerie, diploma project in modelmaking 

Audi R8 V10 sculpted in Alias and rendered in Vred done in 3 month during internship whith Twin Services

The USS Enterprise NCC-1701 in Speedform

Wireframe for the IphoneX in Alias

Concept car Renault El-Ultimo in Clay made during a workshop with a partner

Quick work in Alias+Vred

Iphone made in Alias and rendered in Vred + Photoshop

Final product rendered in Vred

Desk lamp concept n°3 for design class

Desk lamp concept n°2 for design class

Desk lamp concept n°1 for design class

Plaster cast

Painted resin cast of the clay model