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Terragen Discussion / Re: gradual transparency method
« Last post by WASasquatch on Today at 07:05:32 PM »
This looks very good. So, it's procedural and on real world scale?? I need a campfire of only 50cm across and 1m high or so.

I'm sure it could be scaled down, this I believe is based on 2m circle shape masking the base PF. I'll send a clip.
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Terragen Discussion / Re: VDB workflow testing
« Last post by pokoy on Today at 06:24:53 PM »
I finished a batch of renders from 3dsmax with Corona (v2 release candidate 4)

Density had to be set to 2.5 to match TGs output.
With GI enabled, I finally had some success to get something that looks close to TG. Corona simulates anisotropic scattering, by using values from 0.6 to 0.85 (forward scaterring) it finally looked more like clouds instead of a white or gray mass. It was surprising to see that not even 10 GI bounces were enough to get a convincing look so I left it the default limit which is 25. A render with
constant scattering direction at 0.825 is attached.

Using the vdb density channel as scattering input instead of constant and a custom gradient on the output curve I came very close to the GI render from TG but it took to long to render, I'll try to play around with the options another time.


vdb_calib_01_black_cloud_no_shadows---3dsmax_Corona---Density-2.5.jpg

82918-0


vdb_calib_01_shadow_of_black_cloud---3dsmax_Corona---Density-2.5.jpg

82920-1


vdb_calib_01_white_cloud_with_gi---3dsmax_Corona---Density-2.5_ScatterDir-0.825.jpg

82922-2


For comaprison - with isotropic scattering direction (uniform light scattering in all directions) the volume looks all white:
vdb_calib_01_white_cloud_with_gi---3dsmax_Corona---Density-2.5_ScatterDir-0.0.jpg

82924-3


In conclusion, I don't see a reason why the density exported from TG should be changed, we all seem to get good results with it and looking at how differently the density is interpreted depending on the renderer it's hard to say whether the density from TG is off or not.

Matt, would it be possible to get a vdb file with more detail?  ;D

Thanks for the interesting challenge btw, it helps to understand how different media affect scattering direction in light, very interesting stuff.
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Terragen Discussion / Re: World Creator steps up...
« Last post by jaf on Today at 05:58:50 PM »
I purchased WC to replace World Machine, since WM seemed to be slowly dying.
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Terragen Discussion / Re: World Creator steps up...
« Last post by bobbystahr on Today at 05:50:57 PM »
It all looks very promising, although I have to say that many of the images in their gallery still look a bit Brycy, but that will probably change in the future.
What is interesting for me is the possibility to design and sculpt terrains.

Exactly!  You can't export the objects to Terragen.  But for quickly sculpting a terrain to fit into a TG scene, WC seems perfect.

Yeah the ST veg is locked to WC which took the shine off the nickel for me. I really prefer TG over all of the others I've demo'd and I was a Bryce nut for a looooong time and even moderated the forum at rendo for a while.
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Terragen Discussion / Re: How do you mimic moonlight?
« Last post by WASasquatch on Today at 05:47:46 PM »
I guess just low light settings and less GI for darker shadows. The main problem is the colors of veggies and all, as they need to be greyed (if you want the perceivement of a night scene by the human eye).

I think that's where my issue is, with veggies. Perhaps just less diffusion with object colours. I did this with the day scene to make the veggies a bit darker and not so "hot green". Colours tend to pop too much in the darkness.
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Terragen Discussion / Re: World Creator steps up...
« Last post by jaf on Today at 05:47:44 PM »
It all looks very promising, although I have to say that many of the images in their gallery still look a bit Brycy, but that will probably change in the future.
What is interesting for me is the possibility to design and sculpt terrains.

Exactly!  You can't export the objects to Terragen.  But for quickly sculpting a terrain to fit into a TG scene, WC seems perfect.
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Terragen Discussion / Re: How do you mimic moonlight?
« Last post by Dune on Today at 05:44:10 PM »
I guess just low light settings and less GI for darker shadows. The main problem is the colors of veggies and all, as they need to be greyed (if you want the perceivement of a night scene by the human eye).
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Terragen Discussion / Re: gradual transparency method
« Last post by Dune on Today at 05:42:03 PM »
This looks very good. So, it's procedural and on real world scale?? I need a campfire of only 50cm across and 1m high or so.
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Terragen Discussion / How do you mimic moonlight?
« Last post by WASasquatch on Today at 05:41:46 PM »
Wonder how people do moonlight for night scenes?
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Image Sharing / Re: 15 miles on the Erie Canal
« Last post by Hannes on Today at 05:36:33 PM »
Wow! Great shading indeed!
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