Stefan Röttger

← Preintegration | ● | Preintegration Quality →

Example of the pre-integration table (TF is apparent on the diagonal of the table, x-axis=$s_f$, y-axis=$s_b$):

Now we do not render view-aligned slices but view-aligned slabs by performing a 3D texture lookup for the back and front slice → yields $s_b$ and $s_f$. With those we determine the pre-integrated ray intergral by looking the result up in a 2D texture, which contains the preintegration table.

Ring artifacts with and without Pre-Integration:

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