Reduce distortion for trees in orthomosaic

[Malalako]

I am wondering if anyone has advice on how to reduce the distortion for trees in an orthomosaic? The flight settings were:
Mavic 3M at 120m with 90% front 90% side overlap.

My agisoft process is:
1. Import photos
2. Align photos (accuracy setting highest)
3. Optimise cameras (default settings)
4. Build point cloud (quality setting high, all others default)
5. Create DEM
6. Create orthomosiac (default values).

The resulting orthomosaic (see attachment) is not clear - with strange artefacts around the edges of the canopy and a very blurred reconstruction. I then created a model both from the point cloud and the depth maps and then created orthomosaics using these models but the result is similar (see attachments).

Do people have any other suggestions? I have also processed the exact same images in DroneDeploy and there is no distortion at all in the orthomosaic (see attached) - I don't understand how the results can be so different. Unfortunately there is no way to understand what DroneDeploy has done as that system is a bit of a black box.

[Malalako]

I've just realised the issue may have been my use of the 'average' blending mode rather than the default 'mosaic' blending mode. I've redone the orthomosaic based on the DEM (see attached) and it is much better (though still some warping artefacts).

[aggieair]

You could make a DTM terrain model, where Tools > Point Cloud > Classify Ground Points, then make a new DSM using only the ground points in the point classes. It'll will "flatten" the trees in your ortho.