Comment # 25
on bug 72685
from Marek Olšák
smoki, you can ignore that document. Sanctuary doesn't use shadow volumes for shadows. It also doesn't use stencil. There are 2 issues here: 1) HTILE doesn't seem to support rendering to an array texture with SLICE_START == SLICE_MAX != 0 (non-zero layer). The workaround is to set SLICE_START=SLICE_MAX=0 and add slice_size*slice_start to the base address. This won't work with layered rendering, but we should still use the workaround for non-layered rendering, because the performance improvement is really worth it. Note: r600g doesn't use HTILE for array textures, so it may see lower performance increase from HyperZ in Sanctuary. With the workaround above, the rendering is still broken, so it needs one more workaround: 2) In-place DB flushing is broken with HTILE. The DB->CB copy can be used instead.
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