ATMOSPHERE

For all the users of Twilight Render (V1 & V2), to ask questions and get started
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pbacot
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ATMOSPHERE

Post by pbacot » Sun Dec 13, 2015 11:31 pm

i want to use the depth mask feature to work in atmosphere. Sometimes I want to also blur the background. It seems that the differential of depth is most marked in the foreground, with most of the background the same value (white). Can I adjust this so more of the middle ground is represented or the depth is deeper? I'd like to be able to add atmospheric effects further back in the image/ model.

Chris
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Re: ATMOSPHERE

Post by Chris » Mon Dec 14, 2015 3:17 am

That's a good question. I know you can adjust the black to white gradient in a post-pro program like Gimp. I don't know if it can be modified in the render itself. I'll have to take a look at the render settings.

Chris
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Re: ATMOSPHERE

Post by Chris » Mon Dec 14, 2015 3:21 am

It doesn't look like that render method offers a way to modify the depth gradient. You could fake it, I suppose, by adding geometry in the distance to stretch the depth range.

JDZYN
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Re: ATMOSPHERE

Post by JDZYN » Tue Dec 15, 2015 10:15 pm

Try adjusting the levels in Photoshop/GIMP

Fletch
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Re: ATMOSPHERE

Post by Fletch » Wed Dec 16, 2015 1:59 pm

Unfortunately there are no controls for the depth render pass in Kerkythea engine, so we can not add them.

However...
In Kerkythea Forum Rafa created this very well-made tutorial for creating FOG using depth render.
You can adjust the fog map by layering the grayscale z-depth render on top of itself in photoshop, and using Multiply blend layer style, or Overlay blend layer style, and after this, using the Levels slider in photoshop

for higher definition/quality depth mask... just render the depth mask at 2x final res and shrink in Pshop. :rtfm:

JDZYN
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Re: ATMOSPHERE

Post by JDZYN » Wed Dec 16, 2015 9:33 pm

JDZYN wrote:Try adjusting the levels in Photoshop/GIMP
Here's before/after adjusting levels in photoshop, along with the settings.

You can see how sliding the center point to the right, the midtones shift "further back".
Attachments
Zdepth Adjust.jpg
Zdepth Adjust.jpg (252.01 KiB) Viewed 7066 times
Levels.PNG
Levels.PNG (11.84 KiB) Viewed 7066 times

pbacot
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Re: ATMOSPHERE

Post by pbacot » Thu Dec 17, 2015 3:42 am

Thanks for the reply everybody. I've been busy (jury duty).

So I gather from this that:

1) the data is there. Just needs adjusting to get some more distance in the mask.
2) Higher resolution will help in this process .
3) an object in the distance will adjust the range further back. (seems an easy fix).

i''ll check the link. Thanks!

Peter

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