Nice! I feel your pain and elation. Also - your book is amazing and has saved our asses so many times, so thanks! 
TFW you finally get all the matrix math right and can render AR content from scratch with Metal #ARKitpic.twitter.com/N5JyhQjerz
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Thanks so much for the kind words and support. Glad the book was useful to you
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I reckon the difficulty of things like this can be measured by how many times I swap row / column order in case I got it wrong and that’s why it’s not working ;)
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Yep! In this case, the final step was removing an erroneous “.inverse”
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Sounds very, very familiar :D
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was expecting a teapot on your face
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Had to make sure those model-space normals were looking good first
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that’s true, must ensure the teapot handle will be facing the correct direction!
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After Galaxy Brain is NormalSpace Brain
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Fake News! You are quite obviously holding a balloon in your mouth.
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Low rez
#Blackmirror blocking. Relatedly, today@googlevr marketing signals emerging from new campaign about 'relive memories'. Can't believe VP at Google signed off on that creative pitch from their Ad agency.Thanks. Twitter will use this to make your timeline better. UndoUndo
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Was expecting a black screen
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