Blender Git Loki

EEVEE: Depth Of Field: Fix issue with neighborhood comparison

The filter was not using the correct UVs.

EEVEE: Depth Of Field: Add gather density change

To fix closer background undersampling, we change gathering ring
density in the middle of the convolution. We change the weighting
of the already accumulated samples accordingly.

EEVEE: Depth Of Field: Fix missing slight focus convolution

This was due to recent change in the accumulate_sample_pair
function.

EEVEE: Depth Of Field: Fix early out on half res CoC

`layer_threshold` is based on fullres CoC radius. Better compare
apple to apple.

EEVEE: Depth Of Field: Fix slight out of focus missing tile

Slight out of focus tiles needs to be expanded too at least once.

EEVEE: Depth Of Field: Fix ring opacity issues

Accumulate transparency instead of occlusion to avoid precision
error an make closer objects more water tight.

Also fixed reversed occlusion ring accumulation.

EEVEE: Depth Of Field: Disable filtering for foreground

This is to avoid darkening of the edges. This might be fixed if
we also filter the weight buffer (TODO).

EEVEE: Depth Of Field: Add Bokeh shape texture precomputation

To support geometric bokeh shapes, we now use a texture to guide
the gathered samples and modify the scattered pixels shapes.

This is done by a very fast precomputation pass that outputs the
bokeh shape to a texture that is then sampled by the convolution
pass.

EEVEE: Depth Of Field: Dilate CoC Tiles based on max CoC radius

This means we now supports arbitrary large CoC.
This makes sure to always covers the maximum tile radius.

EEVEE: Depth Of Field: Gather median filter

Filter the noisy output of the gather pass. This improves temporal
stability.

EEVEE: Depth Of Field: Scatter optimization

Use neighborhood comparison to reject pixels from scattering pass if
they are not different enough from surrounding pixels.

Logic is here, but this needs refinement. This is mainly to
reject lots of scattering sprites on large out of focus regions
that are really bright.

EEVEE: Depth Of Field: Fix alpha resolve

EEVEE: Depth Of Field: Scatter Occlusion

Use VSM like occlusion texture to avoid light leaking through closer
background and foreground.

EEVEE: Depth Of Field: Fix Weighting

Fix accumulation of center samples and the total sample count function.

EEVEE: Depth Of Field: Improvement part 3

Add Hole Fill pass to fill missing background.

EEVEE: Depth Of Field: Improvement part 2

Add In Focus max CoC tiles to speedup the resolve pass

EEVEE: Depth Of Field: Improvement part 1

Add new gather algorithm.

This involve multiple passes which are well described in each shader.

Shaders have been split into multiple file for clarity sake.

EEVEE: Depth of field: Improve scatter pass

This makes each sprite scatter 4 pixels instead of one.

This roughly divides the render time of the effect by two and
improve the color precision.

The single pass method was creating issues on near/far CoC
discontinuities, so we reverted to a 2 pass method even if a bit
more costly (but still is 2x faster).