PMREM: Implement GGX VNDF importance sampling (#32114)

* PMREM: Implement GGX importance sampling.

* Updated builds.

* Replaced GGX importance sampling with GGX VNDF importance sampling.

* Clean up.

* Updated builds.

* Revert builds.

* Updated screenshots.

* Updated comments.

* Clean up.

* Clean up.

* Increased e2e timeout.

* Updated screenshots.

* Added one more computer to ci.yml

* Puppeteer: Increased to 5 threads.

Author: mrdoob

.github/workflows/ci.yml

@@ -40,12 +40,12 @@ jobs:
   e2e:
     name: E2E testing
     runs-on: ${{ matrix.os }}
-    timeout-minutes: 20
+    timeout-minutes: 30
     strategy:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        CI: [ 0, 1, 2, 3 ]
+        CI: [ 0, 1, 2, 3, 4 ]
     env:
       CI: ${{ matrix.CI }}
     steps: