To achieve a 2.5D effect in Spine and address the issue of incorrect distortion when moving the control bone, it's essential to consider several factors that could be influencing the outcome. The placement of the root bone, the configuration of the mesh, and how the bones are weighted to the mesh can all significantly impact how the perspective distortion appears during animation.
Root Bone Placement: The placement of the root bone can affect the overall movement and orientation of your object. If the root bone is placed differently from the example you're trying to replicate, it might cause unexpected results. The root bone typically serves as the central point of rotation or movement, so its position relative to your object (in this case, a cube) is crucial.
Mesh Configuration: The way your mesh is set up and how vertices are weighted to bones can also lead to distortion issues. For a 2.5D effect, ensuring that the mesh accurately represents the object's volume and that vertices are correctly weighted to control bones is vital. This allows for more natural and expected deformations as the control bone moves.
Control Bone Mechanics: The mechanics of how the control bone influences the mesh can be another factor. If the control bone is meant to simulate perspective changes, its relationship with the mesh and other bones (like the stationary bone you mentioned) needs to be carefully configured. This includes setting up correct bone hierarchies and possibly using constraints to manage how movements and rotations translate into 2.5D perspective shifts.
Inheritance Settings: Check the inheritance settings for the bones involved, especially if you're dealing with non-uniform scaling or rotations that seem off. Disabling "Inherit Scale" or adjusting "Inherit Rotation" for certain bones can sometimes resolve issues with perspective distortion.
Given these points, it's likely a combination of factors, including mesh setup and bone configuration, rather than a single issue. Experimenting with the placement of the root bone, adjusting the mesh, and fine-tuning how bones are weighted and interact can help achieve the desired 2.5D effect. Additionally, reviewing the specific tutorials or examples you're following for any nuances in setup or technique can provide further insights.
