I have a large project that I’m creating quantities off of. The project was 1300 images and several acres. Rather than PIX4D merging the ortho images into a single one, I had it create tiles and use the “MAPIINSERT” with two i’s to insert the tiles into my AutoCAD (Civil 3D) drawing. This worked great, didn’t bog down my drawing and I didn’t’ have to reduce the resolution.
At first, i had hundreds of tiles, but once I noticed the grid pattern, I didn’t need to insert all the tiles and it only took about half hour to get them into my drawing. The nice thing with MAPIINSERT command, it uses the coordinate system so you don’t have ot try to place them manually, just as long as you have the coordinate system setup in your drawing a head of time.