No text, but a visual code

[R. Sale]

This topic is truly significant. The examples are relevant. Your terminology, however, is a bit off the standard. The original name for such a pattern is a 'wolkenband', which is German for 'cloud band'. The current alternative descriptive is 'cosmic boundary', as that is what they generally represent: the boundary between the human and the divine, through which the deity manifests. Cosmic boundaries are also found in various cosmic illustrations, with or without deities.

The original(?) investigation of this topic occurred in conjunction with the comparison of the VMs cosmos to BNF Fr. 565, nearly ten years ago.

There are many ways to draw cosmic boundaries. The 'Oresme' example (565) is generally called a "scallop-shell" pattern. The VMs pattern is a nebuly line, based on the heraldic lines of division, and deriving its descriptive term from Latin 'nebula' meaning 'cloud'.

Here are 241 representations of wolkenbands.

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The VMs artist does things with these patterns that might bear further investigation, the circular designs that are fancy on the outside and 'plain' on the inside are historically uncommon. The use of a nebuly line as a cosmic boundary is uncommon, and the running of the "little mounds" up and down the sides of the undulations is also uncommon.

Examples of a nebuly line as a cosmic boundary do occur in the "Berry Apocalypse", which is interesting because the Duke of Berry was the original owner of BNF Fr. 565.