Exporting directly from Blender to Spine without using a PNG sequence is not straightforward, as there is no direct plugin or tool that facilitates this process. Typically, people export image sequences or videos from Blender and then import them into Spine. If you want to transfer animation data, you would need to export the animation data from Blender in a format that Spine can understand, such as JSON, and then write a script to import it into Spine. However, this requires custom scripting and a good understanding of both Blender's and Spine's data formats.
For more information on Spine's JSON data format, you can refer to the documentation here: Spine JSON Format.
