ADD: Ray tracing shadow with Clipmap shadow blending

CMakeLists.txt

@@ -35,7 +35,7 @@ foreach(GLSL ${GLSL_SOURCE_FILES})
   message(STATUS ${GLSL})
   add_custom_command(
     OUTPUT ${SPIRV}
-    COMMAND ${GLSL_VALIDATOR} -V ${GLSL} -o ${SPIRV}
+    COMMAND ${GLSL_VALIDATOR} -V --target-env vulkan1.2 ${GLSL} -o ${SPIRV}
     DEPENDS ${GLSL})
   list(APPEND SPIRV_BINARY_FILES ${SPIRV})
 endforeach(GLSL)