Correct Answer : Fragment shader
Explanation : The fragment shader is in charge of determining the final colour of each pixel.
Correct Answer : Raycasting
Explanation : Raycasting is a method used in Babylon.js to identify the intersection of a ray and objects in the scene.
Correct Answer : registerAction
Explanation : With registerAction method an action is registered with the action manager.
Correct Answer : Clear
Explanation : Clear method, clears all actions that have been registered with the action manager.