Support Mask3D 支持 Mask3D 算法

[OpenMMLab-Assistant-004]

Support Mask3D

支持 Mask3D 算法

Refer to Mask3D](https://github.com/JonasSchult/Mask3D)) to reproduce its accuracy on ScanNet

参考Mask3D](https://github.com/JonasSchult/Mask3D)) ，复现其在ScanNet上的精度

Task Information

Repository：MMDetection3D

Difficulty：Hard

Points：50

Estimated Time Consumption：28 days

Task Status

Claimant's Github ID：None

Claim Time：None

PR Link：None

Points to Note

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After completing the task, please submit a PR with the title starting with [MMSIG]. After submission, please reply with your PR link in the comments section of this Discussion. We will review your work as soon as possible.

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