Multi-software collaboration and parent-child level defects

I once tried making animations using MarvelousDesigner, UE5, Blender, Substance Painter, and so on, and I found two issues, which I encountered a long time ago and the project files are no longer available. Firstly, MD, SP, and UE all use centimeters as their unit, while UE has the Z-axis pointing upwards, unlike the others which use the Y-axis. Blender, however, is a special case, using meters as its unit and the Z-axis pointing upwards. Assembling in Blender always resulted in various errors, even when I changed the unit to centimeters—it was quite troublesome. Secondly, when holding down Shift and dragging, the parent-child relationships established weren't genuine; the data had to be passed through modifiers, it just looked like a parent-child relationship. It was all rather frustrating."（The memory isn't particularly clear, but I might have been using a metahuman character with the head and body separate at the time. I was attempting to obtain the parent-child set binding data by dragging, something along those lines.） Translation by ai( It's been a long time, I remember it was around version 4.1. Blender had many usability issues back then, such as inadequate sculpting capabilities, and the texture painting was virtually unusable. Everything required purchasing separate plugins, and it was prone to errors and becoming outdated easily