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in set_view, trust rightward
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@ -2944,9 +2944,6 @@ EX void set_view(hyperpoint camera, hyperpoint forward, hyperpoint upward) {
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upward /= hypot_d(3, upward);
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hyperpoint rightward = (forward ^ upward);
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rightward -= (forward|rightward) * forward;
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rightward -= (upward|rightward) * upward;
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rightward /= hypot_d(3, rightward);
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transmatrix rotator = Id;
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rotator[2] = forward;
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