Temple and Cave Designs

Lewis;

The first image shows a section of the cave that is partly exposed to sunlight. The solar system the planet is in has 2 suns, blue and orange. 

The second image is of the interior of the temple with a similar effect to the cave; 2 suns shining through. The orange sun is the weaker of the 2, which is why there is a lack of orange tint in the atmosphere.