Scene Building

• Background wall: Using triangles, texture image, and Lambertian material         
• Earth : Using spheres, texture mapping, and spherical coordmappers for bringing realism   
• White Point source light at the back for scene illumination. It was adjusted till the final scene to bring out the best results.                                                 
• Ceiling: Using triangles and a combination of materials (red Lambertian texture, Phong material, and mirror material). For the scene, we wanted some reflection of the environment on top for good effects, and thus adding a mirror with Phong material gave it a good look.
• Floor: We wanted to give the effect of the cracked surface from which Stone emerged and used Bump mapping for the floor with a cracked texture image with greenish Perlin noise and Phong material. 

Instances of Universe

Using the instancing feature, 2 instances were created for the scene created above. One was translated towards the left and the other was translated towards the right. Translation values were adjusted in order to have proper symmetry on both sides since we wanted to bring out the convergence of past and future timelines around our Stone.  

Reality stone and Mirroring of a dimension

Mirrored walls on the left and right end: Using a combination of materials (mirror material, Phong material with blue texture) mirrored walls were created. 
Reality stone: Spherical object with red Lambertian and glass material
Motion Blur effect in the sphere (to depict the continuous motion to move different universes) 

Final lightning and Sampling

This was the game-changer and a major part of the work. Though the lights were simple to create during assignments but using them with the right values and the right position to bring out the best visuals was a challenge for us which we dealt with our imagination and hit-and-trial
White Point light at the back of the background to provide some basic illumination
Red Point light  on the top, brought out the light mirroring effect at the ceiling as well as shined up the stone
White Directional Light to bring illumination on floors, and mirrors on right & left end. It also brought good contrast to the background
Blue Area lights at the top with quads, It improved the results especially as we see in sci-fi movies
Spotlights: 2 red, 2 blue, and 1 yellow spotlight with different intensities to create the effect of "Halo/Nimbus" for the stone as well as getting stone lit up from below due to reflection at glass material

Samples were increased and adjusted at last to get final image