Chaos Corona Forum
Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: romullus on 2014-07-07, 15:45:56
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I need some help from powerful machine owner. Could someone, who has pc with 32-64GB RAM do a small favorite to me. I need CoronaSky map rendered at as high resolution as possible.
Here is basic instruction, you should follow:
1. create new scene
2. create free camera at world origin, rotate it 90 degrees in x axis
3. assign CoronaCameraMod modifier to that camera, check Override type: spherical
4. assign CoronaSky to Enviroment Map
4.1. create CoronaSun with such settings: Rotation - 223.1 Angle - 75,0
5. set render settings as follow: MSI -0, secondary solver - PT, exposure (EV) - 4, pass limit - 5. Leave rest settings at their defaults.
6. set Image Aspect to 2 in Common tab and render resolution as high as you can (with 16GB RAM i can render 20Kx10K)
7. render
8. save vfb output to hdr format
9. put hdr file to dropbox or anywhere else from where i could download it.
10. have my gratefulness for your kind work :]
Edit: added some additional info to instructions ;]
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I would suggest rendering in maximum resolution possible on your machine and upscale. The sky model is very smooth (if you do not have sun baked in, which is AFAIK not the case in nondevelopment version of corona). There should really be no reason to attempt this.
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Well, sun is exactly the reason why i need this map as big as possible.
OTOH, you gave me good idea, maybe i should render sun separately at much bigger res and combine it with upscaled sky map in photoshop. I'll give it a try.
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sorry, now I read how do you want it exported ;)
BTW: you need to save with 32bit, otherwise the intensity of sun will get clamped
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Ok, upscaling sky and combining with separately rendered sun, trick worked out perfectly, but i couldn't dare to exceed 30K resolution limit, because photoshop screamed at me already. It turned out that even such insane resolution is not enough to match native Corona sun's fidelity. What i wanted to achieve? Well, i just played with custom sun's shape. Tried to replicate this very interesting pheonomena (http://petapixel.com/2012/05/21/crescent-shaped-projections-through-tree-leaves-during-the-solar-eclipse/), but failed :[
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[this may be crazy but] how about a huge area light at a huge height?
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Not so crazy, because it works quite nicely :] But it would be nice to have texmap funcionality in CoronaSun - that'll be really unique feature ;]