I understand some genetics aren't transferable from parent to foal such as brindle and chimera, is lace and manchado categorized as a genetic that cannot be passed down? I've noticed sooty and pangere passes down but I've only got three horses with lace and manchado so I haven't actually tested it yet and was hoping someone had a clearer answer.

Any marking listed under the phenotype section of the gene test is random. So actually sooty and pangere aren't passed down either, though sometimes it can seem like that, since they're such common markings. Lace and manchado are in that category as well.

I thought the same but was confused since some more visible sooty horses I've bred also have similar foals. Thank you for helping me clear it up!