This is an example of the offset filter having been used. The offset filter can be used to create flooring or concrete material eg. wooden floorboards. Offsetting the image a few times will create a better effect for flooring and after each offset, it is better to reconnect all the lines(if lines are used in the image).
Using an alpha channel can create a texture to be used in Secondlife, eg. mesh cover or balustrade so you can see through the material however the texture is not transparent.
Alpha Channel- . The alpha channel is really a mask - it specifies how the pixel's colors should be merged with another pixel when the two are overlaid, one on top of the other.
Additive Colour- It is all about the world of light. Putting light to a surface increases brightness. The more layers there are, the brighter it becomes.
Subtractive Colour - Paints/natural colourants mixed to create a full range of colours. The more layers there are, the darker it becomes.
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