Hi @Ben44
Gaussian Splatting is not photogrammetry when created using POP 4 , it do not produce polygonal models when converted, it is specifically for color models only . Of course you need to scan it first as usual before converting it to 3DGS . The process is much faster as you do 2 things at the same time. 3DGS include transparency and reflection so a little different method and results for a different purpose, you can still use a mobile device to capture the object even outdoors , and later process it on your PC and convert it to 3DGS.