Corner and molding placement is great and I rarely find I need to rotate them after placement. However I almost always have to rotate siding, as I tend to place multiple siding facing the same way without anything behind them.
For example, I want to do this:
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Basically, the idea is to pull siding placement more in line with halfslab placement, such that clicking the side of another siding would generally place it in the same orientation as the other. This is much easier to describe visually:
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Clicking in the highlighted areas would place the siding as shown: