diff --git a/draw/README.md b/draw/README.md
index b1d38b6..a04d09a 100644
--- a/draw/README.md
+++ b/draw/README.md
@@ -37,10 +37,13 @@ All SDF shapes produce mathematically exact curves with analytical anti-aliasing
 no tessellation, no piecewise-linear approximation. A rounded rectangle is 1 primitive (80 bytes)
 instead of ~250 vertices (~5000 bytes).
 
-The fragment shader's estimated register footprint is ~20–26 VGPRs, with Ring_Arc being the
-heaviest shape kind (pre-computed edge normals and branchless wedge evaluation require more live
-values than RRect's sdRoundedBox). Comfortably under the 32-register occupancy cliff on mobile
-Mali and Adreno, and well under desktop architectures' higher limits.
+The fragment shader's estimated register footprint is ~20–23 VGPRs via static live-range analysis.
+RRect and Ring_Arc are roughly tied at peak pressure — RRect carries `corner_radii` (4 regs) plus
+`sdRoundedBox` temporaries, Ring_Arc carries wedge normals plus dot-product temporaries. Both land
+comfortably under Mali Valhall's 32-register occupancy cliff (G57/G77/G78 and later) and well under
+desktop limits. On older Bifrost Mali (G71/G72/G76, 16-register cliff) either shape kind may incur
+partial occupancy reduction. These estimates are hand-counted; exact numbers require `malioc` or
+Radeon GPU Analyzer against the compiled SPIR-V.
 
 MSAA is opt-in (default `._1`, no MSAA) via `Init_Options.msaa_samples`. SDF rendering does not
 benefit from MSAA because fragment coverage is computed analytically. MSAA remains useful for text