To integrate hand-drawn animation from Photoshop into Spine and have the final frame remain and be affected by Spine's motions, you can follow these steps:

1. Create Hand-Drawn Animation in Photoshop:

   • Draw your frame-by-frame animation in Photoshop.
   • Export each frame as a separate PNG file.

2. Import Frames into Spine:

   • Place all the exported PNG files into a directory that Spine watches.
   • In Spine, create a slot and add all the PNG frames as attachments to this slot.

3. Animate Frame-by-Frame in Spine:

   • Use Spine's animation tools to create a sequence where each frame is shown in order. This can be done by setting keyframes for each attachment to be visible at the correct time.

4. Keep the Final Frame:

   • Once the frame-by-frame animation is complete, ensure the final frame remains visible. You can do this by setting the visibility of the final frame attachment to be on after the sequence ends.

5. Apply Spine Motions to the Final Frame:

   • To have the final frame be affected by Spine's motions, you can use bones and weights. Attach the final frame to a bone and use weights to control how it deforms with the bone's movements.
   • You can also use constraints to link the final frame to other parts of your Spine skeleton, ensuring it moves naturally with the rest of the animation.

This approach allows you to combine the flexibility of hand-drawn animation with the powerful skeletal animation capabilities of Spine.

Isekai_lover If you want to use frame-by-frame animation in Spine, it is convenient to check the Sequence option in the properties of the region attachment or mesh attachment. For more information on how to use this option, please refer to the release blog post of Spine 4.1:
https://esotericsoftware.com/blog/Spine-4-1-released#Frame-by-frame-animation

Also you can refer to a tip in the Spine Tips page:
https://esotericsoftware.com/spine-tips#sequences

also have the final frame of the animation remaining on the spine2d animation and be effected by the motions.

I'm not sure I fully understand what you're trying to do, but perhaps it would help if you set the sequence playback option to Once, since the last frame is retained when you set this option.

Isekai_lover Hmmm, your explanation is still vague, but maybe I understand what you mean. Based on your question in the other thread, am I correct that you want the character to, for example, hold his hand at frame 0, open it in the middle of the animation, and then eventually maintain the pose of an open hand? However, even if this is what you want to do, I don't see anything particularly difficult about doing this, so I'm not sure what is unclear to you. Could you tell us what you actually tried and what did not work?

By the way, if English is not a native language for you, this forum has a translate button so you can post your question in your native language.

Isekai_lover Thank you for the additional explanation! I think it would be good to use a mesh and weights. If you make the shadow image a mesh attachment and give the shadow mesh the bone weight for animating the hand, the shadow will move when the hand moves.
If you have any problems after trying it, please don't hesitate to ask.