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Hi Rider
Nebula images suitable for display in Stellarium version 0.10.2 are much different to those available for version 0.9.x and earlier. They need a file textures.json which contains all the necessary information to display them correctly.
I have prepared about 30 extra nebula textures from friends that have given their permission to use with stellarium. They were available from my geocities site but as geocities is no longer available they cannot be downloaded. Some of these are on the stellarium site but they may not be up to date.
Any textures can be adapted to display in Stellarium however it can be a tedious process to enter the data by hand. Each corner of the texture must be located within an arc second to display correctly. Also textures larger than 1 degree square are sometimes impossible to overlay accurately due to plane textures not fitting on a psuedo spherical surface. However I have made three 4 panel nice mosaics of the LMC , Eta Carinae and Rho oph/Antares from Bert's High res pictures which get round this problem to a large extent. There are also an additional 26 textures covering items not included in the default set. These also include the necessary textures.json additions to allow correct display.
The eventual aim is for stellarium to use textures downloaded as required from the DSS. This will remove the need for separate nebula textures as is the case at the moment.
Barry
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