*NOTE*
I apologize for the lack of voiceover on this video, my microphone cut out for a while and apparently this whole video. All you really need to know for slopes is that you need to make sure your linedefs are facing the way they are sloping, so use the linedef flip button if necessary. And also, make sure that if your ramp is independent (i.e. doesnt have raised sectors next to it), you set sidedef textures so you don't get the Hall of Mirrors effect on your ramp.
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On this page of the site you can watch the video online Doom Builder Tutorials - Slopes with a duration of hours minute second in good quality, which was uploaded by the user JaundiceJaun 28 April 2009, share the link with friends and acquaintances, this video has already been watched 3,315 times on youtube and it was liked by 12 viewers. Enjoy your viewing!