diff --git a/src/Renderer.ts b/src/Renderer.ts
index 725e90e..f1cf488 100644
--- a/src/Renderer.ts
+++ b/src/Renderer.ts
@@ -206,6 +206,11 @@ export default class Renderer {
             this.resources.antsPresenceRenderTarget.texture;
         scenes.ants.material.uniforms.uMaterialProps.value =
             this.materialPropsTexture;
+        scenes.ants.material.uniforms.uAntSpawn.value.copy(
+            scenes.screen.antSpawnRequest,
+        );
+        // clear after reading
+        scenes.screen.antSpawnRequest.set(0, 0, 0, 0);
         this.renderer.render(scenes.ants, scenes.ants.camera);
 
         this.setViewportFromRT(this.resources.antsDiscreteRenderTarget);
diff --git a/src/scenes/AntsComputeScene.ts b/src/scenes/AntsComputeScene.ts
index 93332d8..db464af 100644
--- a/src/scenes/AntsComputeScene.ts
+++ b/src/scenes/AntsComputeScene.ts
@@ -24,6 +24,7 @@ export default class AntsComputeScene extends AbstractScene {
                 tPresence: { value: null },
                 uMaterialProps: { value: null },
                 uForagerRatio: { value: 0 },
+                uAntSpawn: { value: new THREE.Vector4(0, 0, 0, 0) },
             },
             vertexShader,
             fragmentShader,
diff --git a/src/scenes/ScreenScene.ts b/src/scenes/ScreenScene.ts
index 4254cdb..6965a04 100644
--- a/src/scenes/ScreenScene.ts
+++ b/src/scenes/ScreenScene.ts
@@ -21,6 +21,12 @@ export default class ScreenScene extends AbstractScene {
     public ants!: THREE.InstancedMesh;
     public readonly groundMaterial: THREE.ShaderMaterial;
     public readonly pointerPosition: THREE.Vector2 = new THREE.Vector2();
+    public readonly antSpawnRequest: THREE.Vector4 = new THREE.Vector4(
+        0,
+        0,
+        0,
+        0,
+    );
     public drawMode: number = -1;
     // zoom stored in Config.cameraZoom
     private isPointerDown: boolean = false;