[Bf-blender-cvs] [27109fd209c] master: Eevee: Normalize Tangents after transform to world space

[Clément Foucault]

Commit: 27109fd209ca572445d9ec27b7f220b01001bf5b
Author: Clément Foucault
Date:   Thu Mar 21 23:52:44 2019 +0100
Branches: master
https://developer.blender.org/rB27109fd209ca572445d9ec27b7f220b01001bf5b

Eevee: Normalize Tangents after transform to world space

Fix T62621 without breaking everything else.

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M	source/blender/gpu/shaders/gpu_shader_material.glsl

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diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl b/source/blender/gpu/shaders/gpu_shader_material.glsl
index 377795b7e44..ccc2b7f8ae5 100644
--- a/source/blender/gpu/shaders/gpu_shader_material.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_material.glsl
@@ -1776,7 +1776,7 @@ void tangent_orco_z(vec3 orco_in, out vec3 orco_out)
 
 void node_tangentmap(vec4 attr_tangent, mat4 toworld, out vec3 tangent)
 {
-	tangent = (toworld * vec4(attr_tangent.xyz, 0.0)).xyz;
+	tangent = normalize((toworld * vec4(attr_tangent.xyz, 0.0)).xyz);
 }
 
 void node_tangent(vec3 N, vec3 orco, mat4 objmat, mat4 toworld, out vec3 T)