diff --git a/code/renderergl2/glsl/dlight_vp.glsl b/code/renderergl2/glsl/dlight_vp.glsl
index d9fd71d0..61531ad6 100644
--- a/code/renderergl2/glsl/dlight_vp.glsl
+++ b/code/renderergl2/glsl/dlight_vp.glsl
@@ -32,7 +32,7 @@ vec3 DeformPosition(const vec3 pos, const vec3 normal, const vec2 st)
 
 	if (u_DeformGen == DGEN_BULGE)
 	{
-		phase *= M_PI * 0.25 * st.x;
+		phase *= st.x;
 	}
 	else // if (u_DeformGen <= DGEN_WAVE_INVERSE_SAWTOOTH)
 	{
diff --git a/code/renderergl2/glsl/fogpass_vp.glsl b/code/renderergl2/glsl/fogpass_vp.glsl
index 40d14d9f..354a6468 100644
--- a/code/renderergl2/glsl/fogpass_vp.glsl
+++ b/code/renderergl2/glsl/fogpass_vp.glsl
@@ -41,7 +41,7 @@ vec3 DeformPosition(const vec3 pos, const vec3 normal, const vec2 st)
 
 	if (u_DeformGen == DGEN_BULGE)
 	{
-		phase *= M_PI * 0.25 * st.x;
+		phase *= st.x;
 	}
 	else // if (u_DeformGen <= DGEN_WAVE_INVERSE_SAWTOOTH)
 	{
diff --git a/code/renderergl2/glsl/generic_vp.glsl b/code/renderergl2/glsl/generic_vp.glsl
index 9ad4489b..ef648ade 100644
--- a/code/renderergl2/glsl/generic_vp.glsl
+++ b/code/renderergl2/glsl/generic_vp.glsl
@@ -73,7 +73,7 @@ vec3 DeformPosition(const vec3 pos, const vec3 normal, const vec2 st)
 
 	if (u_DeformGen == DGEN_BULGE)
 	{
-		phase *= M_PI * 0.25 * st.x;
+		phase *= st.x;
 	}
 	else // if (u_DeformGen <= DGEN_WAVE_INVERSE_SAWTOOTH)
 	{
diff --git a/code/renderergl2/glsl/shadowfill_vp.glsl b/code/renderergl2/glsl/shadowfill_vp.glsl
index 10802eca..af5a14ff 100644
--- a/code/renderergl2/glsl/shadowfill_vp.glsl
+++ b/code/renderergl2/glsl/shadowfill_vp.glsl
@@ -38,7 +38,7 @@ vec3 DeformPosition(const vec3 pos, const vec3 normal, const vec2 st)
 
 	if (u_DeformGen == DGEN_BULGE)
 	{
-		phase *= M_PI * 0.25 * st.x;
+		phase *= st.x;
 	}
 	else // if (u_DeformGen <= DGEN_WAVE_INVERSE_SAWTOOTH)
 	{