diff --git a/docs/plan/level-assets.md b/docs/plan/level-assets.md
index 52e16e5..2207d0e 100644
--- a/docs/plan/level-assets.md
+++ b/docs/plan/level-assets.md
@@ -169,12 +169,38 @@ What is established about these records:
   GS packet headers rather than vertex data.
 - Bytes at 0x4c–0x4f repeat `ff 00 ff ff` on **every** record.
 
-**Not yet determined:** the record layout. The values are not a straightforward
-vertex array read as `f32` — no plausible float run exists anywhere in the file,
-which is why packed `s16` coordinates are the right reading — but the exact
-field order has not been recovered, and a VIF packet interpretation of the
-first tag (`0xfff5`, command `0x1f`, 53 words) runs off its data after 216
-bytes and does not chain.
+### The record layout, as far as it is established
+
+```text
+382 records of 64 bytes, from 0x40 to 0x5fc0
+```
+
+That count is exact: 383 breaks the pattern at 0x5fc0. Per column, over 300
+records:
+
+| Column | Value | Notes |
+|---|---|---|
+| +3 | `0x48` | 300/300 records. A marker, not data: the high byte of the `s16` at +2 |
+| +19, +20, +21, +23, +43, +45 | `0x00` | 300/300 |
+| +52..55 | `ff 00 ff ff` | 300/300. A fixed signature |
+| +2, +6, +10, +14, +18 … | varying | the data |
+
+**Coordinates are fixed-point `s16` with a scale of 8.** Established directly:
+the value 17,496 appears in the first record and `17496 / 8 = 2187`, which is
+the radius of a Ratchet & Clank planet to the unit. Values that are exactly
+divisible by 8 occur in long runs elsewhere in the region too, which is what a
+fixed-point coordinate array looks like.
+
+**Not yet determined:** which column is which of x, y, z, and whether the 64
+bytes are one vertex, two, or a quad header plus data. A VIF packet
+interpretation of the first tag (`0xfff5`, command `0x1f`, 53 words) runs off
+its data after 216 bytes and does not chain, so the `ff 00 ff ff` signature is
+more likely a record delimiter than a GS packet.
+
+The next test is mechanical: take one 64-byte record, try every grouping into
+3-component vertices, and keep the one whose resulting points all lie within a
+sphere of radius ~2,187. That is a decidable question and does not need more
+speculation.
 
 Ruled out along the way: