Custom Nether Roof Height

[KosmicAnomaly]

I use a datapack that doubles the height of the nether. Is there a way to specify what height your nether roof is at?

[alecrux]

This is how I render the Nether Roof on my server:

First, the render mode:
nether_roof = [Base(), EdgeLines(), Depth(min=127, max=256), SmoothLighting(strength=0.5)]
The Depth parameter specifically answers your question.

Then, the rendering looks like this
renders["netherroof"] = { "world": "world_nether", "title": "Nether Roof", "rendermode": nether_roof, "dimension": "nether", "crop": (-500, -500, 500,500) }

You can safely omit the crop.
It's just that all the builds on my servers are located within a small radius on the Nether Roof