Use normal detail reconstruction and adjust the minimal distance between two vertices parameter (the higher the number the less polygons will be created and it should be quicker as well) Try 0.01 for example and move patiently above and above until you are happy with the fast pace and quality. Also, use image downscale parameter to define how many times will be images be downscaled in resolution for reconstruction process to make it even faster. Use reconstruction region wisely to “cut off” the parts you don’t need before reconstructing. To get the color information of your point cloud you need to use Coloring process on the final model and then after that you export your dense cloud.