Author Topic: New, Easy SkyBox Renderer  (Read 12733 times)

Offline Henrik

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Re: New, Easy SkyBox Renderer
« Reply #15 on: June 21, 2012, 09:43:48 AM »
Hello RRMesiah 
Very new to Terragen and skybox. One thing I wonder is whether I can use Ptgui to put together the images rendered from your Render Skybox app? if so, is there a way to do it,have tried, but the ground picture is distorted. I have tried to combine this tutorial with your app.
http://www.planetside.co.uk/forums/index.php?topic=11608.0
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Offline red_planet

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Re: New, Easy SkyBox Renderer
« Reply #16 on: June 25, 2012, 08:43:27 AM »
Hi,

I haven't used this utility to generate images for a skybox but I did use  Hugin http://hugin.sourceforge.net/ to stitch together 6 square images into an equirectangular image. This image was then used as an environment map in 3DS Max.

I made sure the Horizontal field of view was slightly greater than 90 degrees.

Hope this helps

Chris

Offline Pentagular Dark

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Re: New, Easy SkyBox Renderer
« Reply #17 on: July 05, 2012, 11:25:21 PM »
Who says this only has to skyboxes? I can think of some pretty obscure ways this could be used to make planet maps. From inverted planets.
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Offline bigben

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Re: New, Easy SkyBox Renderer
« Reply #18 on: July 06, 2012, 03:21:11 AM »
Hello RRMesiah
Very new to Terragen and skybox. One thing I wonder is whether I can use Ptgui to put together the images rendered from your Render Skybox app? if so, is there a way to do it,have tried, but the ground picture is distorted. I have tried to combine this tutorial with your app.
http://www.planetside.co.uk/forums/index.php?topic=11608.0

Yes you can.  Distortion of images is usually a symptom of setting the incorrect fov or orientation of an image.

I use 90 tiles myself because they're quicker to render and you can feed them directly into a range of applications utilising "sky boxes".
The 2 critical settings for PTGui are in the Create Panorama tab.

1: Uncheck use fast transform. If this is checked you will see small black holes along the seam (especially in the corners)
2: Set the feather slider to the extreme left (Sharp). You have theoretically perfect images so there is no need to feather images at their edges. Feathering will create gaps along the seams as well.

[Edit] FWIW PTGui can also use Panorama Tools for the "rendering" (it was originally made as a GUI for Panorama Tools, hence its name) and the original version of this could also stitch images without overlap nicely.  At some point in its life it appears that the developers who continued Panorama Tools also implemented a faster transformation to improve performance... good for stitching photographs, but it leaves holes in the corners in this situation  :(. A "few" years ago I used it to stitch and re-project rendered frames on the fly such as this 180 cylindical test: http://archive.bigben.id.au/demo/pano_test.avi Still theoretically possible with PTGui. [/edit]
« Last Edit: July 06, 2012, 12:07:07 PM by bigben »

Offline Henrik

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Re: New, Easy SkyBox Renderer
« Reply #19 on: July 16, 2012, 11:55:56 AM »
Thanks Ben
Seems Ptgui struggling to put together the images in the correct order, but if I rename them(1,2,3,4,5,6) I get it to work by trial and error method)
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Offline Henrik

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Re: New, Easy SkyBox Renderer
« Reply #20 on: July 17, 2012, 06:16:03 AM »
Still some problem
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anything