0684b68eb4
This adds a new way of computing occlusion using visibility bitmask. To make it more algorithm agnostic, we name it horizon scan. This cleans-up / simplify the code compared to the Horizon based solution. There is no more trickery for fading influence of distant samples which makes the result match cycles closer. This introduces a new thickness option. Maintaining it relatively low makes it possible to avoid over occlusion because of in front geometry. Making it too low will cause under occlusion. Related #112979 Pull Request: https://projects.blender.org/blender/blender/pulls/114150
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