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General => Terragen Discussion => Topic started by: Will on August 16, 2007, 09:17:18 AM

Title: Two quick(ish) questions.
Post by: Will on August 16, 2007, 09:17:18 AM
First question: Does the detail of the render effect imported objects? I made a moon in Zbrush and the detail doesn't seem to effect it in the TG render though it could be the small render size. Second question: What makes the moon yellow during some nights Is it the refraction and absorption of the light (kinda like redshift) or is something different? I ask this because my moon the I made was given a standard gray shader but in the render its yellowish. I'll post the image when and if it ever finishes rendering.
Title: Re: Two quick(ish) questions.
Post by: old_blaggard on August 16, 2007, 09:30:37 AM
1) Yes, overall quality affects the detail of objects as well.

2) Yes, the "redding" of the moon is caused by refraction in the atmosphere.  You can see this when the moon is high in the sky and looks white/grey, but when it gets lower to the horizon, it has more atmosphere to pass through, and so it tends to look redder and redder the closer it gets.

3) Feel free to correct me if I'm wrong ;).
Title: Re: Two quick(ish) questions.
Post by: Buzzzzz on August 16, 2007, 09:49:20 AM
Looking forward to seeing your finished piece.  :)  You could always disable the secondary atmosphere in the atmosphere settings if you want to be rid of the decay. Just a thought if you are trying to get a clear night scene in the future.
Title: Re: Two quick(ish) questions.
Post by: Will on August 16, 2007, 03:13:28 PM
Good to know, thanks guys. It might be a while till its done a detail of .0125 still takes around 11 minutes to finish. Not sure why though I s'pose a few million polys takes a while to render. DO you know if its possible to be able to see a low poly version of the model in the preview some how because right now I'm just guessing on what part is facing the camera.
Title: Re: Two quick(ish) questions.
Post by: Oshyan on August 16, 2007, 03:18:15 PM
Currently only the simple bounding box view method is available. You need to render a low detail version of the scene as you have been doing in order to see exact object positioning and orientation.

- Oshyan
Title: Re: Two quick(ish) questions.
Post by: Will on August 16, 2007, 03:19:25 PM
Oh well, thanks Oshyan.
Title: Re: Two quick(ish) questions.
Post by: Will on August 16, 2007, 06:16:53 PM
another question, is it possible to change the point around which the object rotates?
Title: Re: Two quick(ish) questions.
Post by: Will on August 16, 2007, 08:12:37 PM
Quick update, I made a turntable of the moon to give you all a sense of what it looks like.

<a href="http://files.filefront.com/Moon_test.mov/;8331419;/fileinfo.html" title="Moon_test.mov">Moon_test.mov</a>

Its on filefront (only place I could find for it) and is around 32 mb. Here is also a low quality test render.
Title: Re: Two quick(ish) questions.
Post by: Matt on August 16, 2007, 10:45:04 PM
Detail affects the size of the microtriangles that TG2 creates in order to create a detailed image. For a Detail of 1 the renderer aims to create microtriangles that are about the size of a pixel or smaller. Very low detail settings result in very large microtriangles. However, if your original object is very high-res and the polygons are already very small when rendered in the image, TG2 may not need to subdivide into microtriangles and therefore the detail setting will have little effect. In this situation a render at detail 0.0125 may take nearly as long as a render at detail 1. The only way around this is to use a low-res proxy object for your test renders and substitute it for your high-res object when doing high-res/detail renders.

Matt
Title: Re: Two quick(ish) questions.
Post by: Will on August 17, 2007, 07:12:08 AM
Ok thanks Matt, Just a note it seems the object loading popup gets stuck after loading the file and this results in having its just be unresponsive but the rest of the program is fine (and the object is completely loaded).