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Using direct3D to create occlusion map

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Hi, I''m sorry if I crosspost both this thread since I don''t know which one replied first. I''ve been reading about Hierarchical Occlusion Map and trying to implement it but I have some difficulties in making the pyramid occlusion map in Direct3D. The idea is to make a set of maps based on their resolution, from the hi-res ''till the lowest res. Can somebody tell how can I make a set of maps (textures) like what I''ve mentioned above as if we''re using bilinear interpolation in filtering to get the lower resolution (in Direct3D pleasee.. ) ''till then I shall continue to dig Direct3D''s docs deeper

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