How to save the rendered file and export it to other formats

Hi,

After we finish our project and rendered the final stage , how to save the file as 3d object and export it to other formats…

Or how to obtain the 3d model and other formats …please help me…

Blender allows you to export your scene to various formats.
But your title implies you want to save the rendered image - you can do that in final render window. At the lower left of that window click on image -> save as image. At the left you can select the formats - png, jpeg, bmp…

Not sure what you mean by “how to obtain the 3d model” your project has the 3d models in the scene.

There is an ‘Export’ option under ‘File’ in the main menu [top right]

When doing this, depending on your setup, it may be difficult to reproduce things like materials exactly as seen when rendered inside Blender. In my experience, this tool is best used for exporting the mesh only.