A new opacity correction approach for oversampled volume ray casting is introduced. While the only existing opacity correction\nmethod in the literature is based on the assumption of dataset homogeneity, the new opacity correction method introduced in this\npaper is a faster, generalized voxel-by-voxel approach which does not assume dataset homogeneity. The new opacity correction\navoids the dataset homogeneity assumption by introducing a new opacity correction factor for the samples in each voxel. Its\nperformance improvement over the existing opacity correction approach is also exhibited for real volumetric datasets.