This is an alternative to Ornatrix shadows that performs full-scale occlusion simulation. Unlike regular shadow maps, deep shadows sample each pixel multiple times depth-wise to allow quick self-shadowing and shadowing all the objects in the scene including those inside the hair itself. Whenever Ornatrix-based rasterizer (ratraycer) is used with lights that implement deep shadow maps, Ornatrix will not self-shadow the hair internally (through raytracer) but will automatically use deep shadow maps to self-shadow the hair.
Location:
Lights -> Shadows -> Ox Deep Shadow Maps
Parameters:
Many parameters of this component are the same as those in Ornatrix shadow maps, so you refer to thathelp for reference.
Error tolerance - Because all of the pixels are being sampled depth-wise deep shadows use a compression mechanism to reduce memory strain. Error tolerance controls how much the shadow data is compressed by controlling how much error is allowed to be introduced. A value of 0 will effectively prevent any compression. A very large value will make the shadow very smooth eliminating any suddle detail.
In the following image you can see the location of this feature. Create Target Spot light and select it, in the Shadows sections select Ox Deep Shadow Maps:
