1 files changed, 4 insertions, 2 deletions
diff --git a/src/datavisualization/engine/shaders/surfaceShadowFlat.frag b/src/datavisualization/engine/shaders/surfaceShadowFlat.frag
index 0613a40c..4b0dfae0 100644
--- a/src/datavisualization/engine/shaders/surfaceShadowFlat.frag
+++ b/src/datavisualization/engine/shaders/surfaceShadowFlat.frag
@@ -7,15 +7,17 @@ varying highp vec3 position_wrld;
 flat varying highp vec3 normal_cmr;
 varying highp vec3 eyeDirection_cmr;
 varying highp vec3 lightDirection_cmr;
+varying highp vec4 shadowCoord;
 
 uniform highp sampler2DShadow shadowMap;
 uniform sampler2D textureSampler;
-varying highp vec4 shadowCoord;
 uniform highp vec3 lightPosition_wrld;
 uniform highp float lightStrength;
 uniform highp float ambientStrength;
 uniform highp float shadowQuality;
 uniform highp vec4 lightColor;
+uniform highp float gradMin;
+uniform highp float gradHeight;
 
 highp vec2 poissonDisk[16] = vec2[16](vec2(-0.94201624, -0.39906216),
                                       vec2(0.94558609, -0.76890725),
@@ -35,7 +37,7 @@ highp vec2 poissonDisk[16] = vec2[16](vec2(-0.94201624, -0.39906216),
                                       vec2(0.14383161, -0.14100790));
 
 void main() {
-    highp vec2 gradientUV = vec2(0.0, (coords_mdl.y + 1.0) / 2.0);
+    highp vec2 gradientUV = vec2(0.0, gradMin + coords_mdl.y * gradHeight);
     highp vec3 materialDiffuseColor = texture2D(textureSampler, gradientUV).xyz;
     highp vec3 materialAmbientColor = lightColor.rgb * ambientStrength * materialDiffuseColor;
     highp vec3 materialSpecularColor = lightColor.rgb;