Differential D11981 Diff 39903 manual/modeling/meshes/uv/unwrapping/seams.rst

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manual/modeling/meshes/uv/unwrapping/seams.rst


	*****			*****
	Seams			Seams
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	For many cases, using the Unwrap calculations of Cube, Cylinder, Sphere, or best fit will produce a good UV layout.			For many cases, using the Unwrap calculations of Cube, Cylinder, Sphere, or best fit will produce a good UV layout.
	But for more complex meshes, especially those with lots of indentations,			But for more complex meshes, especially those with lots of indentations,
	you may want to define a seam to limit and guide the :ref:`bpy.ops.uv.unwrap` operator.			you may want to define a seam to limit and guide the :ref:`bpy.ops.uv.unwrap` operator.

	Just like in sewing, a seam is where the ends of the image/cloth are sewn together.			Just like in sewing, a seam is where the ends of the image/cloth are sewn together.
	In unwrapping, the mesh is unwrapped at the seams.			In unwrapping, the mesh is unwrapped at the seams.
	Think of this method as peeling an orange or skinning an animal.			Think of this method as peeling an orange or skinning an animal.
	You make a series of cuts in the skin, then peel it off. You could then flatten it out,			You make a series of cuts in the skin, then peel it off. You could then flatten it out,
	applying some amount of stretching. These cuts are the same as seams.			applying some amount of stretching. These cuts are the same as seams.

	.. figure:: /images/modeling_meshes_uv_unwrapping_seams_simple.png			.. figure:: /images/modeling_meshes_uv_unwrapping_seams_cylinder.png

	Simple seam on a cylinder.			Simple seam on a cylinder.

	When using this method, you need to be aware of how much stretching there is.			When using this method, you need to be aware of how much stretching there is.
	The more seams there are, the less stretching there is,			The more seams there are, the less stretching there is,
	but this is often an issue for the texturing process.			but this is often an issue for the texturing process.
	It is a good idea to have as few seams as possible while having the least amount of stretching.			It is a good idea to have as few seams as possible while having the least amount of stretching.
	Try to hide seams where they will not be seen. In productions where 3D paint is used,			Try to hide seams where they will not be seen. In productions where 3D paint is used,
	this becomes less of an issue, as projection painting can easily deal with seams,			this becomes less of an issue, as projection painting can easily deal with seams,
	as opposed to 2D texturing, where it is difficult to match the edges of different UV islands.			as opposed to 2D texturing, where it is difficult to match the edges of different UV islands.

	The workflow is the following:			The workflow is the following:

	#. Create seams.			#. Mark seams.
	#. Unwrap.			#. Unwrap.
	#. Adjust seams and repeat.			#. Adjust seams and repeat.
	#. Manually adjust UVs.			#. Manually adjust UVs.


	.. _bpy.ops.uv.mark_seam:			.. _bpy.ops.uv.mark_seam:

	Mark Seam			Mark Seam
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