Improve the cubemap preview

Author: BlueCube3310

editor/plugins/texture_layered_editor_plugin.cpp

@@ -146,9 +146,9 @@ void TextureLayeredEditor::gui_input(const Ref<InputEvent> &p_event) {
 	ERR_FAIL_COND(p_event.is_null());
 
 	Ref<InputEventMouseMotion> mm = p_event;
-	if (mm.is_valid() && (mm->get_button_mask().has_flag(MouseButtonMask::LEFT))) {
-		y_rot += -mm->get_relative().x * 0.01;
-		x_rot += -mm->get_relative().y * 0.01;
+	if (mm.is_valid() && (mm->get_button_mask().has_flag(MouseButtonMask::RIGHT))) {
+		y_rot += mm->get_relative().x * 0.01;
+		x_rot = CLAMP(x_rot - mm->get_relative().y * 0.01, -Math::PI * 0.5f, Math::PI * 0.5f);
 
 		_update_material(false);
 	}
@@ -270,7 +270,7 @@ void TextureLayeredEditor::_update_material(bool p_texture_changed) {
 	materials[0]->set_shader_parameter("layer", layer->get_value());
 	materials[2]->set_shader_parameter("layer", layer->get_value());
 
-	Vector3 v(1, 1, 1);
+	Vector3 v(-1, -1, -1);
 	v.normalize();
 
 	Basis b;