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Problem about VSM shadowmap filtering for point-light

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Hi everyone. Recently I have tried to implement the variance shadow map for point-lights with cube-map. But I found a big problem about this.

The attached screenshot shows what I’ve got. I used some cos-power lobe fitering for the moments cube-map (Yeah I know it is slow and maybe I could use some Edge-Tap-Smoothing tricks to improve this). But there always have some white halo around the depth discontinuities…

Is there anybody know how to improve this? There is very little info on VSM filtering for point-lights on web… And I’m wondering if I should use some bilateral filtering tricks to get rid of these halos.... Any suggestion would be appreciated. Thanks!

Edited by neoragex2002

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