1.5 Casting Shadows

[mafshar]

Hi!

Regarding casting shadows to our scene, I am a little confused about the implementation of it, and I'm not sure how to go about it.

Thank you in advance!

[danielepanozzo]

Without shadows, you need to find a collision with an object, and then iterate over all the lights in the scene to add their contribution to the color. With shadows, before summing up the contribution of each light, you have to cast a shadow ray to check if the light is visible at the collision point. If it is visible you add the contribution, if it is not visible you skip it. Hope this helps!