Merge pull request #18374 from WestLangley/dev_shadow_material

ShadowMaterial: support tone mapping and output encoding

src/renderers/shaders/ShaderLib/shadow_frag.glsl.js

@@ -14,6 +14,8 @@ void main() {
 
 	gl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );
 
+	#include <tonemapping_fragment>
+	#include <encodings_fragment>
 	#include <fog_fragment>
 
 }