grom, 2026-11-09: *"well im in the inn having the improved water on seems to be
messing with our volumetric fog, that is terrible and needs to be fixed"*, and
again from the Deeprun Tram arch. Reproduced, bisected and fixed; the full
account is in `docs/WATER_PORT.md`, round three.
Short version. His own pin is an outdoor street and a still there shows almost
nothing (0.0098 normalised between the lanes, and no yaw over a 360-degree pan
burst beats 0.0106) — but both his SCREENSHOTS are from INSIDE a building, and
an interior scene reproduces it at once: `volfog-inn` moves 0.0846 (mean +16.7)
between the lanes where `stormwind-cathedral-interior` moves 0.0010. His levers
name the term: `mist` off takes it to 0.0036 while `glow`, the underwater family
and `grade` each change nothing.
`veil_apply` integrates its mist layer (scale height 2.5 yd) from the eye to
whatever each pixel shows, with the layer's base at the elected mirror plane —
and asks nothing about where the eye is standing. Its own log says the rest:
veil true: mirror plane 57.7 strength 1.00, in water false, mist true
The pond outside the Goldshire inn elects a plane at y 57.7 and the inn's floor
is at 58.8, so the eye sits 1.1 yards into a layer that is 64% dense there, and
the pond's dawn mist is laid over the hearth, the posts and the stairs.
So the veil takes the gate the sun shafts already take, for the same reason and
from the same resource (`volumetric_light`: *"Interiors (the camera in a WMO
room) take no shafts"*). Measured after: `volfog-inn` 0.0034 against the
reference lane, where switching `mist` off entirely gives 0.0036 — the veil was
all of it, and none of his mist was lost elsewhere.
Also here: the four capture scenarios at the two world positions grom sent
(`grom-fog`, `grom-fog-back`, `grom-rain`, `grom-rain-back`), which is how the
outdoor half above was measured.
Known gap, written down rather than fixed: a camera inside a tunnel looking out
over open water now gets no veil on the water either. The honest shape is a veil
that starts at the room's boundary rather than at the eye; turning it off indoors
is strictly better than painting the room, and is what ships today.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SgstFWtn1RxEJ5kVrpgYwn
gromandClaude Opus 5
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