Author Topic: Micro exporter scene settings for image  (Read 426 times)

Offline dorianvan

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Micro exporter scene settings for image
« on: May 20, 2017, 02:13:26 PM »
Hi all,
I read somewhere by Hannes to turn all GI settings to off or 0, turn off sun shadows, and disable atmosphere. That's good for exporting the geometry, but what settings should one use when exporting the image for use? Should any GI be on, same as for a regular render? Should jitterings be back on? Sun shadows maybe not if the 3d app will generate those. Thanks.
-Dorian

Offline Hannes

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Re: Micro exporter scene settings for image
« Reply #1 on: May 20, 2017, 02:58:48 PM »
Not quite sure, what you mean. Yes, it's fine to turn unnecessary things off to speed up the exporting process. What do you mean by exporting the image for use?

Offline dorianvan

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Re: Micro exporter scene settings for image
« Reply #2 on: May 20, 2017, 03:19:33 PM »
I exported a 200x200 geometry, but of course the image is super bad, so I have to render a high resolution to slap on it in 3dmax.
-Dorian

Offline Hannes

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Re: Micro exporter scene settings for image
« Reply #3 on: May 20, 2017, 07:19:05 PM »
So you want to render something out in 3ds Max with the terrain you exported?
I'd say no good idea. I don't know what you're planning to do, but I guess the main reason for exporting a piece of terrain out of TG is to place something on it in another app (like 3ds Max), maybe render it there with the appropriate light settings and some shadow pass and compose it together with an image rendered in TG, right?

Offline Oshyan

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Re: Micro exporter scene settings for image
« Reply #4 on: May 20, 2017, 07:59:49 PM »
If you're trying to do some kind of front-projection to get TG quality in Max, then you'd render out the TG scene at "full" quality. If you are just trying to get a texture, then you'd want neutral lighting of course, and no haze/atmo, however you'll find it basically impossible to reproduce TG's render quality in Max in large part because the procedural functions do not export well, not to mention there is not a dedicated texture export function.

- Oshyan

Offline dorianvan

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Re: Micro exporter scene settings for image
« Reply #5 on: May 25, 2017, 04:17:09 PM »
Thanks Hannes and Oshyan. What I'm doing is exporting the terrain for the sole purpose of rendering the objects on the terrain (that will be hidden from camera), then comping together the TG shot with the object/shadow pass, like you said Hannes. The purpose of the image for the geometry was only for light bounce.
-Dorian

Offline Matt

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Re: Micro exporter scene settings for image
« Reply #6 on: May 25, 2017, 09:32:55 PM »
The purpose of the image for the geometry was only for light bounce.

In that case I reckon you have two options.

A) Render with all lighting and GI, but make the atmosphere invisible with the checkbox on the render node (or render layer). Then apply this texture as a fully luminous/emissive texture in 3ds Max. This way you can guarantee the lighting on your Max terrain will be the same as the Terragen render. Unfortunately, this won't catch the shadow of your object, so you will get more bounce in the shadow than you should. But perhaps you can do some special trick in the material to apply the object's shadow at render time. Or perhaps you can bring the object into Terragen to cast the shadow, and then it's going to be correct.

Or

B) Render just an unlit diffuse texture and apply this to a diffuse material in Max, so that the Max lights light the terrain. This way your object will cast a shadow onto the terrain before it acts as a bounce light. The potential downside is a lack of resolution in the shading if your geo isn't as detailed as the texture, and you'd also want to be careful to match the brightness of the terrain between Terragen and Max. To render and unlit texture from Terragen, turn off GI, shadows and atmosphere to save render time, and output the "Surface Diffuse Colour (before lighting)" in Render Elements. Actually you might want to enable that render element for all your renders whichever method you choose, in case it's useful.

Matt
Just because milk is white doesn't mean that clouds are made of milk.

Offline Eckstein

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Re: Micro exporter scene settings for image
« Reply #7 on: August 06, 2017, 05:41:33 AM »
Great advice on the light bounce, thanks Matt, I never thought of doing it like that before.