GPU Pro 6

312 IV Shadows

We included various versions of our technique, like the min-filter optimization

and the blocker search variant. We also included an optimized version that uses

the

min-filter optimization, half-resolution Gaussian blurring, and penumbra gen-

eration, plus the mentioned super-sampling to maintain the quality. All of the

variants use the batching method to generate the layered penumbra data.

You can see that SSSS outperforms PCSS and delivers roughly the same per-

formance as PCF. It can be observed that while the techniques based on shadow-

space blurring (PCF and PCSS) took a severe performance hit when increasing

the resolution, the SSSS ...