learn-wgpu/assets/js/26.fd4eb8d5.js

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Let's compare our results with the last tutorial.")]),t._v(" "),s("p",[s("img",{attrs:{src:a(362),alt:""}}),t._v(" "),s("img",{attrs:{src:a(363),alt:""}})]),t._v(" "),s("p",[t._v("Parts of the scene are dark when they should be lit up, and vice versa.")]),t._v(" "),s("h2",{attrs:{id:"tangent-space-to-world-space"}},[s("a",{staticClass:"header-anchor",attrs:{href:"#tangent-space-to-world-space"}},[t._v("#")]),t._v(" Tangent Space to World Space")]),t._v(" "),s("p",[t._v("I mentioned briefly in the "),s("RouterLink",{attrs:{to:"/intermediate/tutorial10-lighting/#the-normal-matrix"}},[t._v("lighting tutorial")]),t._v(', that we were doing our lighting calculation in "world space". This meant that the entire scene was oriented with respect to the '),s("em",[t._v("world's")]),t._v(" coordinate system. When we pull the normal data from our normal texture, all the normals are in what's known as pointing roughly in the positive z direction. 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