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Unsharp mask, soft blur, sharpen, emboss, edge detect are now "tweenable"; however, I think I need to tweak the convolution matricies. At 0 there should be no effect applied which corresponds to a matrix with just a `1` in the middle (ie [...1...]). If the `filterAmount` is small then the matrix is all near 0's causing the image to 'flash black'. If I always add a 1 in the middle then the images become too bright...