UE4.12.4 Apply additive root motion works in preview but not ingame

Hi! I’m on UE 4.12.4, posted in wrong section, and for some reason I’m not allowed to delete that post, so here is the same post in the correct section

I have an enemy moving through 3d space, and since I could find no information on how to implement a 3d blendspace, I instead created 2 separate ones: One 2d with the x and y movement, and one 1d with the Z movement.

In the webm below, you can see how it “beautifully” addativily adds the root motions from both the 1d and 2d blendspaces causing the monster to move in all 6 directions. (up, down, turn left, turn right, forwards and backwards) depending on a supplied vector.

However, ingame, the 1d blendspace’s root motion isn’t applied! The other parts of the animation blend properly, i.e with the vector 0,0,1 I can see him brace the wings downwards as intended, but the root motion of that animation is ignored! Even though the root motion worked flawlessly in the preview!

The setup is really simple, and here’s some pictures of it:

Here we can see how the wings are bracing, but its still in the air instead of moving upwards as it did in the preview.

Here’s the super-simple animation BP of the state:

Here’s what I already checked and tried:

Correct state: There is only one state of the animation and that is the one in the preview.

Movement vector set correctly: Yes, even printed it out each frame when testing, its correctly at -1 or +1.

So anyone have any clue why it works as intended in the preview but not ingame? The first blendspace (the 2d one) has its root motion properly applied, so with the vector 1,0,1 it moves forwards, but not upwards, so the character seems properly set up, and yes the default and preview settings in the anim-bp are the same.

Best regards,

Hey Krachn,

I’m having some trouble reproducing this on my end. Would you be willing to migrate your content over to a blank example project and send it to me?

If you’d rather send privately, you can PM me a download link on the forums.

Sent a PM with a link!

Hey Krachn,

I just wanted to let you know I’m still investigating this, but I may not get to an answer for you until tomorrow. Thanks for your patience.

Hey Krachn,

I don’t know why I didn’t think of this before, but do you have “Can Fly” enabled and your “Default Land Movement Mode” set to Flying?