Lặp lại quá trình ngẫu nhiên lựa chọn hình vuông từ lớp lưới, sau đó, trong khi lựa chọn các hoạt động, tạo ra một lớp hue / saturation và làm thay đổi màu sắc trong những khu vực này. Lặp lại quá trình này một lần nữa, nhưng lần này sử dụng một lớp điều chỉnh độ sáng / tương phản để tạo ra một số khu vực sáng. | Part Four Illustrative Photography 23 Repeat the process of randomly selecting squares from the grid layer then while the selection is active create another hue saturation layer and alter the colors within those areas. Repeat this process again but this time use a brightness contrast adjustment layer to create some bright areas. And finally create a levels adjustment layer while there is no current selection active. Use the CMYK input levels sliders to lighten the midtones and highlights of the underlying layers. To accentuate the line work select your grid group in the Layers palette and drag it above all of the other layers within the main group. Masking the group In addition to the existing vector mask there are other ways to control what parts of the group are hidden and what parts are visible. 1 Finally return to your original grid layer. Again use the Wand tool to select a number of square areas from that layer. With the selection active target the main group in the Layers palette and choose Layer Layer mask Hide Selection from the menu. 2 As you can see it is possible to use a layer mask and a vector mask at the same time. Select the Pen tool. This time enable the Subtract from Path Area option in the Tool Options bar and target the layer mask. Zoom in close on the image. 3 Target the group s vector mask and using the grid as a visual guide trace over sections along the edges of the ribbons. Because the Pen is set to subtract as you create closed shapes with the vector mask targeted they ll be removed from visibility. 340 Chapter 17 The Third Dimension PART SIX Adding dimension 24 Collapse the layer group in the Layers palette to hide the contents as we are now finally finished with this group. Create a new layer and drag it beneath the group in the Layers palette and ensure that it remains targeted. Select the Pen tool and choose the Add to Path Area option. Draw a number of closed shapes to represent the areas of the face that we would see behind it as the
