Gaussian blur is result of blurring an image by Gaussian function. We need to use large kernel to make strong blur and this cause the high complexity. And that's why we should use multi-pass which is seperated into horizontal, vertical pass . It can reduce the complexity and make faster. In Spark AR there are many ways to make it. And I wanna introduce one of them using shader files (.sca). You can download it for free from the gumload link below. It is modulated to adjust horizontal, vertical strength easily . Hope this can help you. Loading...