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The explanatory text in the MeshLod sample says that meshes can be converted back and
forth between v1 and v2. The code for this sample uses MeshManager::createByImportingV1
to convert v1 to v2. But how would one convert a V2 mesh to V1?

Hi,

maybe you can try this one:

if ((v1Mesh = Ogre::v1::MeshManager::getSingletonPtr()->getByName(tempMeshFile, Ogre::ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME)) == nullptr)
{
				v1Mesh = Ogre::v1::MeshManager::getSingletonPtr()->load(tempMeshFile, Ogre::ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME,
																		Ogre::v1::HardwareBuffer::HBU_STATIC, Ogre::v1::HardwareBuffer::HBU_STATIC);
}

Best Regards
Lax

See v1::Mesh::importV2. See MeshTool which provides this functionality.

Note: createByImportingV1 guarantees that vertex buffers will be regenerated if the device is lost (i.e. by loading the V1 mesh again and importing it again). There is no such convenience functionality for v2 -> v1.