hi Jason
I have had a look at some of those items and spoken to one of the developers. It appears that some of this is due to early code still in the program that will be fixed before the full version 1.0.0 is released. This could be some time yet. The next bug fix release will be 0.10.0.
I believe M1 and M42 should appear as they do when flag_bright_nebulae is false as this is supposed to be a level they would appear in a dark sky normally. The cut off level is set by their actual magnitude. However not all the nebulae have this data in the program core and are displayed only by the nebula_textures.fab so they are completely off when flag_bright_nebulae is false. M45 appears almost unchanged because it is that bright in a dark sky.
I agree that a dynamic key input should however be able to turn all the textures on or off and I have passed that info on.
Barry
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