In this way, your shadow appears to subtract light from the environment. One grounding technique is to add a glow around a hologram on the nearby surface, and then render a shadow against this glow.
While stereoscopic rendering provides one depth cue for your holograms, adding grounding effects can help users see more easily what surface a hologram is near. Because the light from the displays is added to the light from the real world, white pixels are translucent. Black pixels are fully transparent, while brighter pixels are increasingly opaque. Devices with see-through displays, such as HoloLens, add light to the world. Key to holographic rendering is knowing what kind of device is being used. Rendering enables your application to add the light. Holograms are objects made of sound and light. Holographic rendering enables your application to draw a hologram at a precise location in the world around the user, whether it's precisely placed in the physical world or within a virtual realm you've created.
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