Without seeing more of your model it's hard to know what's going on. It looks like you have coincident geometry on top the canopy. Or, it's an issue in the game. Can you upload the canopy mesh so I can look at it? I bit more info about what you are doing and what game it's going to would help diagnose.
Can you turn off shadow casting for the canopy in the game? It also could be a Max 2009 compatability issue with more modern software and hardware. A lot has changed in 15 years.
What game engine are you using it in?
Rob Holmes

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3ds Max (2023-2025), V-Ray 6.2, Ryzen 9 3950-X Processor, DDR 4 128MB, Gigabyte Aorus X570 Master motherboard, Sabrent Rocket NVMe 4.0 M.2 drives, NVidia RTX 4090, Space Pilot Pro, Windows 11 Pro x64, Tri-Monitor, Cintiq 13HD, Windows 11 x64
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