Nvidia's Simultaneous Multi-Projection can provide performance shots outside of VR

In addition to all the hardware news that was highlighted during Nvidia’s Pascal event, some software features were also presented. One such was Ansel, a camera mode that allows the player to capture extra cool images in games that support the feature. Another new feature is Simultaneous Multi-Projection which will enhance the VR experience.

Simultaneous Multi-Projection is intended to solve a problem in VR where unnecessary calculations are made during rendering. When a VR scene is to be calculated, two images are rendered, one per eye, and these are then manipulated so that the generated image experience looks correct through the lenses of the VR headset. During the process, a lot of data is discarded, which leads to unnecessary load on the hardware.

With Simultaneous Multi-Projection, developers can render a scene from as many as sixteen user perspectives (viewports), where a user perspective corresponds to what the scene looks like to the viewer (player). The different user perspectives are angled towards each other to create the distortions that must occur for the image to look correct in VR.

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When using this function, the graphics cards do not have to render the contents of the distorted parts of the image, which should reduce the amount of rendered pixels by 33 to 50 percent. This is a relief that can come in handy outside of VR, something that developer Cyan Inc has demonstrated in practice with the upcoming game Obduction.

The puzzle game’s 3D engine has been supported for Simultaneous Multi-Projection, and according to developers, this has given the game a performance boost from 45-50 fps to over 60 fps when the function has been activated.

The Maxwell-based Geforce GTX 900 family supports a related technology called Multi-res Shading. It allows developers to render the central parts of the image in high resolution and lower resolution for the periphery of the image, which also reduces the amount of pixels that need to be rendered.

Source: PC Gamer