VM generation, vCPU count, and location are irrelevant when creating a disk snapshot for an image version.

Using a VM of a different generation than defined in the gallery may result in compatibility issues and is potentially unsupported.

For VM2, matching the region and VM generation is necessary, but CPU settings are recommendations rather than requirements.

VM3's different region poses a challenge as compute galleries are region-specific, and cross-region image sourcing may not be supported, affecting data transfer and latency.