MEDIA_RESOLUTION_ULTRA_HIGH: Native resolution?

MEDIA_RESOLUTION_ULTRA_HIGH requires inputs to be rasterized images, but doesn’t specify the “native” resolution. I am working with non-rasterized inputs with extremely fine detail, where aliasing would be a major issue: if I rasterize to 3072x3072 or 4096x4096 but the model resizes to something else, it would lead to a large quality degradation.

Is it possible to specify?

The best I can find is a doc from 2024 that specifies 3072x3072, but that doc predates ULTRA_HIGH.