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-rw-r--r--drivers/gles2/shaders/scene.glsl2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gles2/shaders/scene.glsl b/drivers/gles2/shaders/scene.glsl
index 9251e21080..3e64c92e96 100644
--- a/drivers/gles2/shaders/scene.glsl
+++ b/drivers/gles2/shaders/scene.glsl
@@ -526,7 +526,7 @@ FRAGMENT_SHADER_CODE
#if defined(ENABLE_NORMALMAP)
normalmap.xy = normalmap.xy * 2.0 - 1.0;
- normalmap.z = sqrt(1.0 - dot(normalmap.xy, normalmap.xy));
+ normalmap.z = sqrt(max(0.0, 1.0 - dot(normalmap.xy, normalmap.xy)));
// normal = normalize(mix(normal_interp, tangent * normalmap.x + binormal * normalmap.y + normal * normalmap.z, normaldepth)) * side;
normal = normalmap;