Adds a new depth of field shader with improved autofocus & new 3 pass blur with bokeh style effect.
fixes the bug with shadows/sky tint disappearing when looking at certain angles (due to improper culling in the shadow maps from incorrect water height detection)
Includes new cinema shader from @srjtjsykyk with new options and some changes. Includes vignette, film grain, overlay, letterboxing, color aberration, dirt lens.
this PR builds on the commits from PR #97