Doublesky effect with skyboxes
Posted: Thu Feb 05, 2009 19:18
I don't think that this is possible, but just to check. I have been trying to use Unreal-style 360° skyboxes with the Quake/Hexen like double sky effect. You know the one where you specify 2 skies and one is drawn over the other but the front one has holes in it so you can see the one behind. So you can scroll clouds over a static background, for example.
I've tried a few things to get transparent holes in the front sky (PNGs with transparency, Doom format with transparency, Doom palette with index 0 (as per the Wiki)) and have managed to create holes in my front sky. However, I can only see HOM where the holes are, not the rear sky.
At present, I don't have a decent skybox to do this with but, if it is supposed to work, I might try to get Terragen to make a cloudy sky that I can then edit to remove everything but the clouds so that I can "superimpose" it over another skybox. If, however, it isn't supposed to work, there isn't any point in me fighting with Terragen (which I'm not very proficient at) to try and get the skybox.
I've tried a few things to get transparent holes in the front sky (PNGs with transparency, Doom format with transparency, Doom palette with index 0 (as per the Wiki)) and have managed to create holes in my front sky. However, I can only see HOM where the holes are, not the rear sky.
At present, I don't have a decent skybox to do this with but, if it is supposed to work, I might try to get Terragen to make a cloudy sky that I can then edit to remove everything but the clouds so that I can "superimpose" it over another skybox. If, however, it isn't supposed to work, there isn't any point in me fighting with Terragen (which I'm not very proficient at) to try and get the skybox.