diff --git a/Templates/Full/game/shaders/common/lighting/advanced/reflectionProbeArrayP.hlsl b/Templates/Full/game/shaders/common/lighting/advanced/reflectionProbeArrayP.hlsl
index 2d34d79e0..a4834363d 100644
--- a/Templates/Full/game/shaders/common/lighting/advanced/reflectionProbeArrayP.hlsl
+++ b/Templates/Full/game/shaders/common/lighting/advanced/reflectionProbeArrayP.hlsl
@@ -88,8 +88,8 @@ float3 boxProject(Surface surface, ProbeData probe)
    float3 PositionLS = mul( probe.worldToLocal,  float4(surface.P,1.0)).xyz;
    
    float3 unit = probe.boxMax-probe.boxMin;
-   float3 plane1vec  = (unit - PositionLS) / RayLS;
-   float3 plane2vec = (-unit - PositionLS) / RayLS;
+   float3 plane1vec  = (unit/2 - PositionLS) / RayLS;
+   float3 plane2vec = (-unit/2 - PositionLS) / RayLS;
    float3 furthestPlane = max(plane1vec, plane2vec);
    float dist = min(min(furthestPlane.x, furthestPlane.y), furthestPlane.z);
    float3 posonbox = surface.P + surface.R * dist;