Is it possible to apply fog to a specific area in Three.js instead of being dependent on the distance from

Picture this: a vast THREE.PlaneGeometry representing the floor with a camera placed at an arbitrary spot within the scene.

By manually adjusting the near and far values of the fog, I can effectively conceal the outer edges of the plane to create the illusion of infinity. So far, so good.

However, here lies the conundrum - what happens when I navigate my camera through the scene, moving it to random locations across the plane? If the camera gets too close to the perimeter of the plane, the fog fails to obscure the boundaries because the fog is linked to the camera's position.

With that in mind, how can we implement a fog effect that only kicks in when you approach the edges of the plane?

Answer №1

My understanding of how the fog system works is somewhat limited, so I would appreciate any corrections or additional insights.

It seems that fog is only rendered on the camera itself and cannot be applied to individual objects. It's not possible to create a fog object like a cube made entirely of fog unless shaders are utilized to mimic a fog-like effect. However, if you were to enter the object, the fog may not render as expected or be visible.

One way to dynamically adjust fog rendering is by changing it based on the camera's position. As the camera moves further from the center, the fog appears closer to the camera. This can be achieved by calculating the distance between the camera and the plane center, where X represents the maximum distance the camera can reach.

Determining the distance from the center on the XY plane is relatively simple. By positioning the center of the plane at 0,0, the X and Y coordinates of the camera can be easily obtained. From there, the hypotenuse relative to the X and Y axis can be calculated (refer to the gif below).

Is it possible to apply fog to a specific area in Three.js instead of being dependent on the distance from

Answer №1

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