The H5N5 mirror of the same stack, drawn from the same N5 volume
More information
My suspicion is that somewhere, either the database-hardcoded tileWidth and tileHeight, or the s0 block shape, is being used to calculate which block to fetch and where to put it. An XY-smaller block being painted into an XY-larger hole would explain the letterboxing. Selecting which block to use based on incorrect block sizing would be more wrong the higher the scale level, which is why higher scale levels wouldn't show up at all.
It's more likely to be the s0 size which is being used, as changing the mirror's tile width/height in the admin panel does not seem to affect this bug.
Having differently-sized blocks is useful if you're aiming for blocks of a consistent real world size while downscaling anisotropic pixels towards isotropy. For example, igor's bottom scale level has resolution 5,5,35, and uses the downscaling factors
Short description
When blocks are different sizes, the bottom level renders fine, but other levels either have each block letterboxed or do not render at all.
To reproduce
It works fine in
More information
My suspicion is that somewhere, either the database-hardcoded tileWidth and tileHeight, or the s0 block shape, is being used to calculate which block to fetch and where to put it. An XY-smaller block being painted into an XY-larger hole would explain the letterboxing. Selecting which block to use based on incorrect block sizing would be more wrong the higher the scale level, which is why higher scale levels wouldn't show up at all.
It's more likely to be the s0 size which is being used, as changing the mirror's tile width/height in the admin panel does not seem to affect this bug.
Having differently-sized blocks is useful if you're aiming for blocks of a consistent real world size while downscaling anisotropic pixels towards isotropy. For example, igor's bottom scale level has resolution 5,5,35, and uses the downscaling factors
to achieve pixel near-isotropy at scale 3, then isotropically downscales by powers of 2 from there.