diff --git a/src/lightmap/cpuraytracer.cpp b/src/lightmap/cpuraytracer.cpp
index ef10da1..05b3147 100644
--- a/src/lightmap/cpuraytracer.cpp
+++ b/src/lightmap/cpuraytracer.cpp
@@ -251,7 +251,7 @@ void CPURaytracer::RunLightTrace(CPUTraceState& state)
 		float attenuation = 0.0f;
 		if (state.PassType == 0 && surface)
 		{
-			Vec3 e0 = Vec3::Cross(normal, std::abs(normal.x) < std::abs(normal.y) ? Vec3(1.0f, 0.0f, 0.0f) : Vec3(0.0f, 1.0f, 0.0f));
+			Vec3 e0 = Vec3::Normalize(Vec3::Cross(normal, std::abs(normal.x) < std::abs(normal.y) ? Vec3(1.0f, 0.0f, 0.0f) : Vec3(0.0f, 1.0f, 0.0f)));
 			Vec3 e1 = Vec3::Cross(normal, e0);
 			e0 = Vec3::Cross(normal, e1);
 
@@ -308,7 +308,7 @@ void CPURaytracer::RunLightTrace(CPUTraceState& state)
 
 				if (state.PassType == 0 && surface)
 				{
-					Vec3 e0 = Vec3::Cross(normal, std::abs(normal.x) < std::abs(normal.y) ? Vec3(1.0f, 0.0f, 0.0f) : Vec3(0.0f, 1.0f, 0.0f));
+					Vec3 e0 = Vec3::Normalize(Vec3::Cross(normal, std::abs(normal.x) < std::abs(normal.y) ? Vec3(1.0f, 0.0f, 0.0f) : Vec3(0.0f, 1.0f, 0.0f)));
 					Vec3 e1 = Vec3::Cross(normal, e0);
 					e0 = Vec3::Cross(normal, e1);
 					for (uint32_t i = 0; i < state.SampleCount; i++)
diff --git a/src/lightmap/glsl_rgen_light.h b/src/lightmap/glsl_rgen_light.h
index 7b30a28..19cfd51 100644
--- a/src/lightmap/glsl_rgen_light.h
+++ b/src/lightmap/glsl_rgen_light.h
@@ -87,7 +87,7 @@ void main()
 		float attenuation = 0.0;
 		if (PassType == 0 && surfaceIndex >= 0)
 		{
-			vec3 e0 = cross(normal, abs(normal.x) < abs(normal.y) ? vec3(1.0, 0.0, 0.0) : vec3(0.0, 1.0, 0.0));
+			vec3 e0 = normalize(cross(normal, abs(normal.x) < abs(normal.y) ? vec3(1.0, 0.0, 0.0) : vec3(0.0, 1.0, 0.0)));
 			vec3 e1 = cross(normal, e0);
 			e0 = cross(normal, e1);
 
@@ -139,7 +139,7 @@ void main()
 
 				if (PassType == 0 && surfaceIndex >= 0)
 				{
-					vec3 e0 = cross(normal, abs(normal.x) < abs(normal.y) ? vec3(1.0, 0.0, 0.0) : vec3(0.0, 1.0, 0.0));
+					vec3 e0 = normalize(cross(normal, abs(normal.x) < abs(normal.y) ? vec3(1.0, 0.0, 0.0) : vec3(0.0, 1.0, 0.0)));
 					vec3 e1 = cross(normal, e0);
 					e0 = cross(normal, e1);
 					for (uint i = 0; i < SampleCount; i++)