Hi Nadiia and welcome on the forum! to do so, make sure the new images have the same proportions as the old ones. Spine will try to fit them on the old meshes otherwise.
Here you can read more: Meshes - Spine User Guide: Image resize
Hi Nadiia, do you have access to an exported json? you might be able to find the lenght and width of the images this way. For example if you look at the export of the goblins-mesh.json, you'll find this info:
"spear": {
"type": "mesh",
"uvs": [ 1, 0.11236, 0.77096, 0.13278, 0.76608, 0.21781, 0.75642, 0.386, 0.74723, 0.54607, 0.72117, 1, 0.28838, 1, 0.24208, 0.54327, 0.22589, 0.38361, 0.2089, 0.21605, 0.20043, 0.13242, 0, 0.11519, 0.4527, 0, 0.58399, 0 ],
"triangles": [ 5, 6, 4, 6, 7, 4, 4, 7, 3, 2, 9, 1, 9, 10, 1, 10, 12, 1, 12, 13, 1, 1, 13, 0, 10, 11, 12, 3, 8, 2, 8, 9, 2, 7, 8, 3 ],
"vertices": [ 1, 20, 38.54, -10.88, 1, 1, 20, 30.97, -5.93, 1, 2, 19, 61.48, -5.58, 0.5116, 20, -0.31, -6.16, 0.48839, 2, 18, 64.73, -5.03, 0.50272, 19, -0.4, -5.06, 0.49728, 1, 10, 4.56, 23.91, 1, 1, 10, 41.7, -138.95, 1, 1, 10, 32.41999, -141.1, 1, 1, 10, -6.49, 22.4, 1, 2, 18, 65.48, 6.64, 0.50272, 19, 0.52999, 6.59, 0.49728, 2, 19, 62.18, 6.66, 0.5116, 20, 0.2, 6.09, 0.48839, 1, 20, 30.96, 6.61, 1, 1, 20, 37.25999, 11.09, 1, 1, 20, 79.75, 1.59, 1, 1, 20, 79.78, -1.29, 1 ],
"hull": 14,
"edges": [ 24, 22, 22, 20, 10, 12, 2, 0, 24, 26, 0, 26, 8, 10, 12, 14, 6, 8, 14, 16, 2, 4, 4, 6, 16, 18, 18, 20, 20, 2 ],
"width": 22,
"height": 368
}
which means that the spear is 22x368 px
Otherwise, if you don't have access to the original images nor a json, trying to re-export a json from what you have will result in the missing info of height and width for images converted to a mesh. In this case, you'll have to redo everything, yes.
