From 99a20ac032d80acc89eaedf91a0b974728c64e4f Mon Sep 17 00:00:00 2001
From: evanpelle <evanpelle@gmail.com>
Date: Mon, 8 Jun 2026 14:31:02 -0700
Subject: [PATCH] Shrink warship shell sprite to a single pixel
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The shell (unit-atlas.png col 7) was a centered 3×3 white square, so it
rendered as a 3×3-world-tile block. Replace it with a single centered
white pixel so shells render as one pixel, matching the original
pixel-shell look. The atlas is sampled with NEAREST and unitSize is 13
(1 atlas px ≈ 1 world tile), so the lone pixel stays crisp.

Update the UnitPass header comments that described the shell as 3×3.
---
 resources/atlases/unit-atlas.png        | Bin 578 -> 298 bytes
 src/client/render/gl/passes/UnitPass.ts |   8 ++++----
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/resources/atlases/unit-atlas.png b/resources/atlases/unit-atlas.png
index 77d9489cbe9b48bd7e743e52e442090f8f42cb02..ceb8edcb0f2eeaae00c8203827a8d9429e1ce103 100644
GIT binary patch
delta 271
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delta 553
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diff --git a/src/client/render/gl/passes/UnitPass.ts b/src/client/render/gl/passes/UnitPass.ts
index 5d24afa8b..4476ac5a7 100644
--- a/src/client/render/gl/passes/UnitPass.ts
+++ b/src/client/render/gl/passes/UnitPass.ts
@@ -4,9 +4,9 @@
  * Renders all mobile (non-structure) units: boats, nukes, shells, SAM
  * missiles, and MIRV warheads. All unit types are rotationally symmetric
  * — no rotation needed. Sprites are tiny grayscale PNGs colorized on the
- * GPU using the standard 3-band gray replacement (180/130/70). Shell and
- * MIRV Warhead use programmatic 3×3 white squares (colorized to border
- * color).
+ * GPU using the standard 3-band gray replacement (180/130/70). MIRV
+ * Warhead uses a programmatic 3×3 white square (colorized to border
+ * color); Shell is a single white pixel.
  *
  * Two instanced draw calls per frame — ground units and missiles are
  * split into separate buffers for correct layer ordering:
@@ -21,7 +21,7 @@
  *   Col 4: Hydrogen Bomb (9×9)
  *   Col 5: MIRV (13×13, grayscale colorized)
  *   Col 6: SAM Missile (3×3)
- *   Col 7: Shell (3×3 white square)
+ *   Col 7: Shell (1×1 white pixel)
  *   Col 8: MIRV Warhead (3×3 white square)
  *   Col 9: Train Engine (5×5)
  *   Col 10: Train Carriage (5×5)