Thanks for the fast reply.
i work as a freelance 3d artist using tools other than blender, have been in the business for 3.5 years, doing archviz mainly.
what i was looking for is to understand the possibilities of photo matching in blender. if you be so kind as to check the chocofur tutorial, the guy manages to get the image matched without any plugins, and from a single image. and he also managed to do that with an incorrect focal lens of 22. I know it is incorrect because i developed the habit of examining the metadata of anything i use. and indeed the camera data was provided in the metadata of the image he himself used.
so the workflow i wish to inquire about is the “wingin’ it” approach. that might be useful in some cases like the acquisition of an image from a client with no details and no data, and the client require the change of certain design element.
the concept of photo matching is totally new to me, because the way i usually work as an architect and a 3d artist is that i either design the space myself using sketches , then CAD plans, then finally go to my 3D program of choice. or get an already finished CAD drawings from a professional firm that i then begin to visualize.
i am trying to kill two birds with one stone, learn a little of blender, as i have been trying to do for several years now, but due to little or no free time never succeeding. and learn a new technique as a whole.
again thank you for your help.