Background image

Taltan · February 07, 2007, 02:33:26 PM

Hi

I was testing out starfield in TGTP by using a starfield image and stick it on the background node. However, I decided that the stars were boring and I procured a much more advanced starfield image with different sized stars and shapes. But the image is inrecognizable when I apply it to the background. My initial though was that the image somehow got compresses to fit in the background sphere, so I increased the radius of the sphere, but to no avail. So, how can I use a more detailed image?

rcallicotte · February 07, 2007, 03:10:36 PM

How are you creating your background? Are you using the Default Shader?

Taltan · February 07, 2007, 03:44:13 PM

I am indeed using the default shader. I applied the image to the Colour image and Luminosity image (as stated in the starfield tutorial).

rcallicotte · February 07, 2007, 04:18:14 PM

Did you turn the Luminosity to 10?

Taltan · February 07, 2007, 04:28:09 PM

Yes, and diffuse to 1. But that is not the problem. Look at the attached image. It shows my original picture on the left and you can see how it turns out when rendered. The origianl picture is 1366x1035 if that is of any importance.

rcallicotte · February 07, 2007, 04:38:00 PM

I've seen this. It has to do with either your settings (check all of them) in your Default Shader or how you've linked the Default Shader into where the Background Shader once was.

I know this works with as large as 1600X1200, since I've done it.

Will · February 07, 2007, 04:38:05 PM

way it your quality at?

Regards,

Will

Taltan · February 07, 2007, 04:46:09 PM

I am rendering with 0.4 quality.
I connected the Default Shader node into Surface Shader in the internal network of the Background node. All the default shader settings are equal to that of the starfield example.

Will · February 07, 2007, 04:47:26 PM

you may want to try increacing your quality, when I do orbital shots I use at least 1.

Regards,

Will

Taltan · February 07, 2007, 04:51:03 PM

Increasing the quality did not do any good. Also, I am not doing orbital render. The camera is at ground level.

Will · February 07, 2007, 05:13:58 PM

hmm well, it it just this image? I had the same problum a while back with piture of a nebula im trying to remember how I fixed it.

Regards,

Will

Taltan · February 07, 2007, 05:16:33 PM

No, not just this image. It seems that the problem is persistant with detailed images. Since I have no problem with getting a good result with a simple starfield image. If you are able to remember I would really appreciate it

Will · February 07, 2007, 05:35:50 PM

could you post the image file so I could play around with it please?
Regards,

Will

Taltan · February 07, 2007, 05:43:28 PM

http://antwrp.gsfc.nasa.gov/apod/image/0407/cygnus_cannistra_big.jpg

Will · February 07, 2007, 05:46:53 PM

thanks I get on it now.

Regards,

Will