Scene depth to reduce (e.g. the G-buffer depth).
Inverse-projection entries (m10, m14, m11, m15) for the NDC→view-linear reconstruction (see depth_reduce.wgsl).
(m10, m14, m11, m15)
NDC depth of the cleared far plane to skip (0 for reversed-Z, 1 otherwise).
Scene depth to reduce (e.g. the G-buffer depth).