RTX 3080 Ti首发?NV开发全新光追算法:性能提升60倍
by teikaei光追虽好,但对性能一直是个问题,NVIDIA正在研发新的光追算法ReSTIR,光追性能可提升60倍。NVIDIA的RTX光追技术推出2年了,日前CEO黄仁勋表示有33款游戏支持了RTX光追,毫无疑问光追会是游戏的未来,但普及之前要解决性能问题,否则只有高端显卡才能跑得动了。
日前NVIDIA介绍了一种新的光追算法,命名为ReSTIR(reservoir-based spatiotemporal importance resampling,基于储层的时空重要性采样)算法,这是与达特茅斯学院视觉计算实验室联合开发的新技术,不需要复杂的灯光结构,也不需要全局光照参数化,直接就能让数百万光线渲染直接照明。
![https://static.cnbetacdn.com/article/2020/0525/b336c5ae094c113.png https://static.cnbetacdn.com/article/2020/0525/b336c5ae094c113.png](https://static.cnbetacdn.com/article/2020/0525/b336c5ae094c113.png)
目前在RTX 2080 Ti上,可以做到在每帧在50ms内实现340万个光线照明,与现有的光追技术相比,其速度快了6到60倍,如果承受部分能量损失,那么速度可以快35-65倍。
60多倍的光追性能提升如果能够实用化,那么光追对性能的影响就再也不是问题,不过该技术最大的问题就是现在还没有明确什么时候问世,今年NVIDIA已经推出了7nm安培GPU架构,此前揭秘的主要是AI和计算方面的,图形方面的技术还没公开多少,但是RTX光追技术会是升级的重点,之前的传闻说是4倍光追性能。
根据之前的爆料,今年9月份NVIDIA就会跟AMD一道推出新一代显卡,RTX 3080 Ti也是箭在弦上了,其RTX光追技术有什么变化,大家等等就知道了。
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ReITSR光追场景截图
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