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钢笔教程
photoshop钢笔练习十步曲钢笔练习十步曲！a、b、c分别代表钢笔的三个控制点如下：。...........。.............。a............b...............c1、按住CTRL 鼠标点b 然后拖动 观察现象并记住此功能。2、按住CTRL 鼠标点a或c 然后拖动 观察现象并记住此功能。3、按住ALT 鼠标点b 观察现象并记住此功能。4、按住ALT 鼠标点a或c 然后拖动 观察现象并记住此功能。5、画下一个节点时按住SHIFT 观察现象并记住此功能。6、画下一个节点时按住CTRL 观察现象并记住此功能。7、画下一个节点时按住SHIFT 不松鼠标拖动 观察现象并记住此功能。8、回到以绘完的接点(就是b)，按住ALT点b 观察现象并记住此功能。然后不松并拖动观察现象并记住此功能。9、回到以绘完的接点(就是b)，按住CTRL点b 并拖动观察现象并记住此功能。10、不用键盘，单独用鼠标绘制，观察现象并记住此优点。你只要把这10步练习5遍，你将会成为扣图高手！扣图中的小问题,小技巧:a\绘制中修改节点后,点一下最后的节点,然后接着绘制,这样不会另起一条路径.b\闭合路径后直接按CTRL+回车将路径变为选区.c\在路径面版下面,有把选区变为路径的按纽,变为路径后输出AI格式,可到AI里直接调用.
豪宅变成鬼屋效果教程
在菜单上选择：图像?调整?色调/饱和度，将房屋边缘的颜色调整成屋顶的颜色。接下来要算是教程中最为复杂的部分，因为我们需要手绘出房屋缺失的部分。为了达到这样的目的我主要使用了仿制图章工具，这个工具可以使你将图片的其他部分当作参考。比如：底层和中间窗户之间的瓦片是借助屋顶的瓦片绘制出来的。
妙手回春-逆转不透明度
如下图，我们要做的就是上面半透明的一层（大且复杂的一个水印）去掉，还原底图的原貌。（注：下面图层的运算实际上是RGB值的运算） 这好比我们从一个地方走到另外一个地方，需要返回，最安全可靠的方法就是沿原路走回去。先看看我们是怎么走过来的！不透明度混合原理：覆盖图层以X%的不透明度和底图混合，得到的混合图等于覆盖图层乘以X%再加上底图乘以（1-X%）。 如何走回去就不言自明：底图等于混合图减去覆盖层乘x%之后再除以（1-X%），但是我们只能找到覆盖层的原图，并且不知道它是以多大的不透明度混合的怎么办？不要紧，我们后面会把不透明度找出来。
