: If lighting looks strange or portals aren't transparent, you may need to edit your autoexec.cfg file in the portal_rtx/cfg folder.
For a complete visual walkthrough of every test chamber and the final boss, you can watch this guide: Portal With RTX Full Walkthrough (All Puzzles | DLSS 3) YouTube• 10 Dec 2022 Portal.with.RTX.part3.rar
Do you have of the RAR archive, or are you missing one of them? : If lighting looks strange or portals aren't
: Right-click on Part 1 and select "Extract Here" using a tool like WinRAR or 7-Zip. The software will automatically pull data from Part 3 and others to rebuild the full file. Portal.with.RTX.part3.rar