Graphics
If you are programmatically assigning an image as a DiffuseMaterial to your 3D model, then you need to make sure that you have created TextureCoordinates. I was using some sample code that created a 3D object - and tried to change the brush from a color to an image. The color worked fine, but the image never showed (it was invisible). The reason was that the sample code only did mesh.Positions.Add() and mesh.TriangleIndicies.Add(). When I added the appropriate mesh.TextureCoordinates.Add() lines...
This post will explain how to do fading (fade out a layer) in Gimp. Assuming you have an image open... Add a new layer Draw the part you want faded Right click on the layer in the Layers panel/window and select 'Add Layer Mask', then click on Add on the Add Layer Mask dialog (making sure the default value of 'White (full opacity)' is selected). Select the Blend/Gradient tool and set the Gradient to 'FG to GB(RGB)' . On the layer click and drag a line where you want the gradient (fade) to start and...
Open your image. Select the area you want to make transparent. Select the appropriate selection tool from the Tool window or the Tools - Selection Tools menu on the Layer window. I usually use the magic wand/fuzzy select (Select contiguous region) tool or the Select regions by color tool. Click in the region you want selected. Use shift-click to add more regions/colors. Tip: It's easier if you zoom in (View - Zoom menu) to see finer details of exactly what you're selecting. In the Layer window (the...