There's more to graphics tech than resolutions and framerates

Last year I interviewed Ken Silverman, creator of the Build engine (used in games like Duke Nukem 3D and Shadow Warrior) as part of a monthly article series I write in Custom PC about graphics engines. While preparing for the interview, I read through his timeline for the engine's development, which is published on his website. Amid all the technical jargon and details of publisher deals was the simple line "Finally added SLOPES!"

It stood out because whereas so much of the information was factual and to the point, this entry conveyed more emotion; a strong sense of both relief and achievement. I asked him what the big deal was, and he responded thus:
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