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-rw-r--r--client/shaders/object_shader/opengl_vertex.glsl4
1 files changed, 4 insertions, 0 deletions
diff --git a/client/shaders/object_shader/opengl_vertex.glsl b/client/shaders/object_shader/opengl_vertex.glsl
index 59171145f..968a07e22 100644
--- a/client/shaders/object_shader/opengl_vertex.glsl
+++ b/client/shaders/object_shader/opengl_vertex.glsl
@@ -39,11 +39,15 @@ void main(void)
lightVec = sunPosition - worldPosition;
eyeVec = -(gl_ModelViewMatrix * gl_Vertex).xyz;
+#if (MATERIAL_TYPE == TILE_MATERIAL_PLAIN) || (MATERIAL_TYPE == TILE_MATERIAL_PLAIN_ALPHA)
+ vIDiff = 1.0;
+#else
// This is intentional comparison with zero without any margin.
// If normal is not equal to zero exactly, then we assume it's a valid, just not normalized vector
vIDiff = length(gl_Normal) == 0.0
? 1.0
: directional_ambient(normalize(gl_Normal));
+#endif
gl_FrontColor = gl_BackColor = gl_Color;
}