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Using OSL Bitmap Lookup nodes causes 100% CPU usage in 10 min when scene saved/loaded with container (saved/loaded) with materials that contain OSL Bitmap Lookup nodes.
Looks like that might be a bug. I'd encourage you to report it. They'll likely get back in touch with you about it.
Bug Reports:
https://www.autodesk.com/company/contact-us/product-feedback
Rob Holmes
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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If possible, can you share a sample scene?
Does the CPU go back to normal after a while, or does it keep increasing over time?
Is there a dedicated GPU, or is it integrated?
Does it happen when switching from Standard to High Quality? If so it's normal since it's forcing the shader compilation.
Giuseppe Schiralli
3ds Max - QA Analyst>
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