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Align

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Align Shell Horizontally or Vertically

Align is a simple tool to align based on selection. Align Shell Horizontally and Vertically needs an edge selection. Using these two can rotate the shell using the edge to align to the horizontal or vertical axis.

Rotate To Optimal

Rotate to optimal uses an algorithm, so called rotating calipers. This algoithm always try to find the best possible bounding box area to UV area ratio. In UVReactor the algorithm is slightly modified, since it tries to find the minimum height of the UV shell, so basically the outcome will be a horizontally aligned UV shell. This approach provides the best UV area ratio in many cases.

Rotate To World Up

Rotate to World Up is a simple tool to align UV shells to an orientation where in world space the textures will point to the global Z-up direction. This is especially usefule when you have to align UV shells to textures that has a direction, like leakages, wood, brick, roof tiles etc.