After collecting car images, we can use them to create a spline cage. But before that i used Image Modeler where you can create cameras matched with an each image. Basically you set up a manual point cloud( which we can use to place a start and end point of spline) which helps to calibrate cameras. Later, points and cameras were exported in Blender where I made a spline cage with help of images:
Using these splines I made Base Mesh with polygons:
For the next step, i will cut the mesh for hood, doors, lights and other parts...