What is the current best software or servit for creating 3D mesh maps? I've used Pix4D for small stuff, but no matter how many pics I use it doesn't seem to come out as good as other demos I've seen. Also I'd like to be able to see it online, but it never works when I try to upload to their site. What other good options are there for free (or really cheap) 3D mapping for relatively small areas. Ideally can be shared online.