From c8a07d07832f4c55636a769e638e1a97c508150d Mon Sep 17 00:00:00 2001
From: Jared Miller <jared@smell.flowers>
Date: Thu, 12 Mar 2026 10:25:34 -0400
Subject: [PATCH] Fix ant rendering GLSL version mismatch causing phantom food
 carry
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The ant rendering ShaderMaterial was missing glslVersion: THREE.GLSL3
while every other material in the project had it. The vert shader used
varying (GLSL1) and the frag used in (GLSL3), causing vIsCarryingFood
to receive garbage values — making all ants appear to carry food from
the first frame regardless of actual state.

Also reverts the debug +20 cell spawn height offset.
---
 src/scenes/ScreenScene.ts | 1 +
 src/shaders/ants.vert     | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/scenes/ScreenScene.ts b/src/scenes/ScreenScene.ts
index 74e7a8f..4566b67 100644
--- a/src/scenes/ScreenScene.ts
+++ b/src/scenes/ScreenScene.ts
@@ -99,6 +99,7 @@ export default class ScreenScene extends AbstractScene {
             vertexShader: vertexShaderAnts,
             fragmentShader: fragmentShaderAnts,
             transparent: true,
+            glslVersion: THREE.GLSL3,
         });
 
         this.createInstancedAntsMesh();
diff --git a/src/shaders/ants.vert b/src/shaders/ants.vert
index 12221a8..51b3bc5 100644
--- a/src/shaders/ants.vert
+++ b/src/shaders/ants.vert
@@ -3,8 +3,8 @@ precision highp int;
 
 #define PI 3.1415926535897932384626433832795
 
-varying vec2 vUv;
-varying float vIsCarryingFood;
+out vec2 vUv;
+out float vIsCarryingFood;
 
 uniform sampler2D tData;