From the perspective of OPENGL, how is this done? Please go into every object in it in detail, including light, shadow, color and so on.

The pictures in movies are generally not rendered by OpenGL, but by ray tracing. OpenGL pays more attention to speed than the physical correctness of rendering, so it is generally used in games, not movies. Pixar uses their own shader language, which is much more complicated than OpenGL shader language.

However, some graphics technologies are interrelated among different rendering methods. In the above picture, in addition to the high-quality 3d model, there are several important phenomena that are very important for realism:

1. Soft shadow (right wall), self-shadow of hair.

2. Environmental protection, such as the corner of a beam.

3. Translucent, such as Remy's feet, tail and beard.

4. Refraction of water

5. Depth of field, such as the back wall and the roof are virtual.

6. Motion blur, such as green on the left (soap? ) The top is imaginary in the vertical direction and the right is real in the horizontal direction.

7. Bloom, like the highlight of cheese on Remy's head.

All the above phenomena except 4 belong to global illumination, which is difficult to make directly with OpenGL. But in OpenGL games, there are basically corresponding technologies to simulate these effects, except that Pixar movies are rendered by more accurate ray tracing methods. These effects, coupled with the quality of the model, determine the gap between the game screen and the movie screen.