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Is there a tutorial on creating effect textures?

DragonflightDesign

DragonflightDesign

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i.e. those bmp and dds files in the \effects\textures folder. What the colour bands do/mean etc.. For example; I've just modified fx_fireAdd.bmp to create a fairly good exhaust gas explosion when starting up a big radial, but I did it by trial-and-error not knowing exactly what I was doing and why the end product worked as well as it does.
 
The answer to this one is use a .dds file and not a 24-bit bitmap with alpha channel. It appears that Photoshop does not export the 24-bit bmp with alpha in a format that P3D recognises.

[Edit] Save the dds file as BC3 (RGB with alpha). Compared to the default bmp files, using dds seems to give finer control over the alpha channel results onscreen. As for 'what the colour bands do/mean', in hindsight that was a stupid question and I realised the answer pretty much as soon as I posted. If you take the fx_1.bmp file (which seems to be very commonly used for nav lights etc.) and use Blend Mode = 2 in the .fx file, the simulator blends the base colour parameters stated in the .fx file with each of the pixels in the fx_1.bmp file to create a much more realistic effect onscreen.
 
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