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-rw-r--r--src/renderergl2/glsl/lightall_vp.glsl2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/renderergl2/glsl/lightall_vp.glsl b/src/renderergl2/glsl/lightall_vp.glsl
index f6164957..67628c7f 100644
--- a/src/renderergl2/glsl/lightall_vp.glsl
+++ b/src/renderergl2/glsl/lightall_vp.glsl
@@ -206,7 +206,7 @@ void main()
#if defined(USE_LIGHT_VECTOR)
vec3 L = u_LightOrigin.xyz - (position * u_LightOrigin.w);
#elif defined(USE_LIGHT)
- vec3 L = attr_LightDirection;
+ vec3 L = attr_LightDirection * 2.0 - vec3(1.0);
#if defined(USE_MODELMATRIX)
L = (u_ModelMatrix * vec4(L, 0.0)).xyz;
#endif