Autodesk 12812-051462-9011 User Guide 3 - Page 547

View Image Opens a window that shows the bitmap surrounded by a region outline with handles at its sides and corners. To change the size of the crop area, drag the handles. To move the region, position the mouse cursor inside it and drag. To see the results of editing the region, turn on Apply (see preceding). This shows changes in the region as you make them. The bitmap window has U/V and W/H (width/height) controls on its toolbar. Use these to adjust the location and size the image or crop area. When Place is chosen, dragging the region area handles changes the scale of the bitmap (hold down Ctrl to preserve the bitmap's aspect ratio), and dragging the image changes its location within the tile area. The UV/XY button at the right of the window toolbar lets you switch between using UV or XY coordinates in the toolbar spinners (Default=UV). . Crop Makes cropping active. Place Makes placement active. U/V Adjusts the bitmap location. W/H Adjusts the width and height of the bitmap or crop area. Jitter Placement Specifies the amount of random offset. At 0, there is no random offset. Range = 0.0 to 1.0 When Place is turned on, the size and position specified by the spinners or editing window are ignored. The software then chooses a random size and tile position for the image. Alpha Source group Controls in this group determine the source of the Output alpha channel in terms of the input bitmap. Image Alpha Uses the image's alpha channel (disabled if the image has no alpha channel). RGB Intensity Converts the colors in the bitmap to grayscale tonal values and uses them for transparency. Black is transparent and white is opaque. None (Opaque) Does not use transparency. Premultiplied Alpha Determines how alpha is treated in the bitmap. When turned on, the default, premultiplied alpha on page 8096 is expected in the file. When turned off, the alpha is treated as non-premultiplied, and any RGB values are ignored. 5802 | Chapter 19 Material Editor, Materials, and Maps