The art of creating drop shadows in Three.js

Is there a method to create a shadow without needing a "ground" plane to project it on? I prefer this option so that when the camera moves around the object, it doesn't appear as though the shadow is passing through the ground.

I am currently utilizing Three.js with the latest version and the WebGl renderer.

Answer №1

Achieving this effect is simple with the use of ShadowMaterial on a plane geometry. This unique material allows for transparent shadows to be cast, providing a seamless integration into the scene. Place the plane geometry in the desired location and watch as the magic unfolds. For more information, visit:

Answer №2

Creating a shader that displays shadows on a transparent plane may seem like an impossible task at first glance. However, by cleverly manipulating the shadowratio and incorporating blending states in the rendering context, it is indeed achievable.

The key is to smoothly transition between the shadowratio and a transparent black or white color within the pixel shader. This technique allows for a seamless display of shadows on a transparent surface, making them visible only when passing through the actual shadow itself.

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