I'm going to be getting a 3D scanner

[Peter Grass]

The Koala is a small part. Only about 16 mm high. If one wants to see the sharpness of the rounded corners, one needs sub-LDU resolution, which is about 3-4 times as many triangles as you have now. Most of them will not be needed in the end, but it seems mesh reduction isn't as selective as one would wish.

Can you try the color scan on the koala?

I tried the colour scan on both the koala and the candle but they are too shiney for the colour to be picked up. If I was scanning something like stone instead of plastic it would probably work. When scanning colour you are also using the lasers which shine on the object which makes them even more shiney so its a catch 22 situation. If you coated them in scan spray that would also hide the colours so that wouldn't work either.

There are apps to selectively decrease the amount of polygons while keeping the detail but they are crazy expensive since they are meant for game development so certainly not in my budget. You could maybe manually do it in blender but that would take ages and not be a fun task.