diff --git a/packages/core/src/shaderlib/particle/horizontal_billboard.glsl b/packages/core/src/shaderlib/particle/horizontal_billboard.glsl
index 86382707f..b9649f94e 100644
--- a/packages/core/src/shaderlib/particle/horizontal_billboard.glsl
+++ b/packages/core/src/shaderlib/particle/horizontal_billboard.glsl
@@ -1,7 +1,7 @@
 #ifdef RENDERER_MODE_HORIZONTAL_BILLBOARD
 	vec2 corner = a_CornerTextureCoordinate.xy + renderer_PivotOffset.xy;
-	const vec3 sideVector = vec3(-1.0, 0.0, 0.0);
-	const vec3 upVector = vec3(0.0, 0.0, 1.0);
+	const vec3 sideVector = vec3(1.0, 0.0, 0.0);
+	const vec3 upVector = vec3(0.0, 0.0, -1.0);
 	corner *= computeParticleSizeBillboard(a_StartSize.xy, normalizedAge);
 
 	// HorizontalBillboard rotates in XZ plane (around Y-axis normal).