How to disable downsampling during rotation

How to disable downsampling during rotation

When Not Rotating

During Rotation

This is called Level Of Details (LOD). You can disable that from Edit > Settings > Render View by setting a high LoD Threshold

I do want to mention that LOD has it’s advantages. You are basically spinning a smaller version of your data, and LOD will allow you to move your dataset with (as a guess) 10 to 100 times better frame rates than the original dataset. Obviously, your mileage may vary depending on the size of the dataset.