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DarkBASIC Professional Discussion / how do you do a space backdrop?

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Cruise McClarren
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Posted: 19th Dec 2011 23:19
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I was looking at ESF and want to know how they did the backdrop. EVery method I try doesn't work. For trial purposes I am using one of their image files to try to recreate the effect (I know I can't use it for anything else but for this purpose it is ok) I tried using a sphere and textured/culled it. But the image is so blurry that it looks horrid. Then I tried to just texture the backdrop with the image but that didn't work either. Then I added a camera and tried texturing that camera's backdrop to see if that would make a difference... and... nope. I would like to know how they made it so crisp and clear. In the game you can fly forever and never get closer to the actual backdrop but if you turn in any other direction you get a nice panorama of the whole image. Can someone please assist me in this? Thanks

LIFE: "That thing that happens to us when we are too young to die"
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chafari
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Posted: 20th Dec 2011 04:07
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You have to add a big image and it must be seamless to appy to a sphere, then position the sphere in the same position of the camera. Example attached

Cheers.

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bitJericho
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Posted: 20th Dec 2011 16:33
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What's ESF?


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Phaelax
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Posted: 20th Dec 2011 18:11
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Google tells me ESF = Earth's Special Forces (dragon ball z game)

"You're not going crazy. You're going sane in a crazy world!" ~Tick
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Blobby 101
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Posted: 20th Dec 2011 18:13
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ESF is actually Earth Space Fleet, a space sim that Ermes (I think) made a little while ago

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Chris Tate
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Posted: 20th Dec 2011 23:52
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ESF by Ermes created in DBPRO: http://forum.thegamecreators.com/?m=forum_view&t=181249&b=5

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baxslash
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Posted: 21st Dec 2011 08:03
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Ermes is very helpful, I would ask him on his thread or send him an email.

You can make space skyboxes using my own tool "EnviroScope" which is free and add your own images to the scene as part of the backdrop. It can make skyspheres to but it takes an age to render and the effect is no better than a skybox: EnviroScope


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Cruise McClarren
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Posted: 22nd Dec 2011 23:46 Edited at: 22nd Dec 2011 23:48
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Quote: "
@ Chafari
"


I saw what you have done. I tried that method and it still comes out to be a very blurry mess. Plus at the poles of the sphere I get a warped image with everything coming together. ::see photo:: I want to make it look sharp and clear as if you were really there and I can't figure it out.

LIFE: "That thing that happens to us when we are too young to die"
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chafari
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Posted: 23rd Dec 2011 00:02
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Quote: "I saw what you have done. I tried that method and it still comes out to be a very blurry mess"


I was just showing you the method of a sky sphere. You can use a big resolution image 4096*4096 and a good sphere from 3DMax...or you colud use the free baxslash's program.

Cheers.

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Chris Tate
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Posted: 23rd Dec 2011 00:48
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Quote: "I saw what you have done. I tried that method and it still comes out to be a very blurry mess."


Mip-Mapping may be the cause of this blur. Your sphere needs to maintain pixel perfect rendering to be effective; MipMapping will use low resolution versions of your textures at long distances. A texture higher in resolution than your monitor display would not show up blurry for any other reason I can think of.

Anisotropic filtering can lower the mip-mapping blur. I cannot provide much knowledge on this topic.

Note that you can use as many spheres as desired; to create the effect of stars and planets at different distances, by rotating each sphere at different speeds. The sphere should have transparency enabled, along with somekind of shader or blendmode which enhances the composition with additive light.

I've not created a Spacesim myself, but a couple of star spheres, cosmic-dust spheres, halos and a few 3D planets and asteroids should look good.

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Diggsey
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Posted: 23rd Dec 2011 00:55
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Is this what you are looking for?

Using my special method of applying an image to a sphere with very little distortion.

[b]
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chafari
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Posted: 23rd Dec 2011 01:42 Edited at: 23rd Dec 2011 01:42
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@Diggsey

Great example !! I first I thought it was a sphere, but at the end I saw the trick

Cheers.

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