What I mean by engine friendly, is that some people are not going to know that if they are not familiar with Unreal Engine scaling so when they see ‘Scene Unit Scale’ it should be called Unreal Engine Scale Units or down in the help description when you hover the mouse over the scale unit, also pop up a list of game engines that the scale units supports so then those who are not experienced with Blender or with the game engine they have then know what scale units to use for what game engines that they do have. Now a help system like that on Blender’s import/export settings would certainly make things more easier so then you don’t accidentally select the wrong settings for
your game engine and that should clear some of the confusion once you can see the relationship the game engines have with those settings. I’m sure some of the plugins
for blender for unreal engine have made some effort towards that.
True Blender supports Unreal Unit Scale, but Blender is a little bit different, because the armatures appear enormously big in that program… And there is
an issue in that program (don’t know if its been fixed yet in the latest version) that if you do move the bones of the armature around when you’re in the object mode, it will
shift the bones of the armature in Blender 3d world location space and cause them to move or twist the armature bones out of place, it won’t always show this up on the armature in Blender so you have to check the Rotation, Transform and Scale to see if the numbers have been altered and when the scale rotation bug gets triggered off, the way to fix it is to have to reset the armature again, then and rescale it 100 times up or so… But if the armature is not reset and the infected armature is then exported out then the bug will show up in Unreal Engine in the skeleton editor as stretched or warped twisted bones in the skeleton editor before you even add in the animations or set
up the re-targeting… But if you try to retarget it if the armature was not reset before exporting to Unreal Engine then the animation retargeting will be a warped mess.