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Glass Dragon
Comments: 3
LitoNico

18.04.2024, 22:25

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Description:	Nothing special at all going on here. This is a preset scene I have done nothing but use the global illumination settings and used Perfectville.hdri as skylight. Ambient is set to 0. Skylight and indirect light are checked. The global illumination is really awesome. The noise is frustrating but I am sure there is a solution I do not yet understand. Quite a cool program that Carrara6pro. Anyhow this is just to confirm for Render Man that ambient glow is not necessary in Carrara. Carrara has superior lighting tricks that make ambient even more obsolete in Carrara than it would be in Bryce.
Added by:	rashadcarter1
Keywords:	rashadcarter1, Carrara6
Date:	04.29.2008 06:31
Hits:	3226
Downloads:	81
Rating:	0.00 (0 Vote(s))
File size:	299.9 KB

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davidbrinnen
Admin

Join Date: 01.03.2004
Comments: 2224

Yes the lighting effects in Carrara are very good, particularly the indirect lighting coupled with caustics. The black spotches I've experienced myself in experiments, I think putting the photon count up helps, but obviously this impairs render time. Also the noise, less noticiably compaired with the spotches, but still irritatingly seems to get all over the materials. Minor grumbles I suppose...

04.29.2008 11:32

Render Man
Member

Join Date: 11.10.2007
Comments: 358

Nice experiment. I was using the indirect lighting in my other scene with Carrara instead of Skylight and this could be were the problem was. I had to turn the HDRI light up to the max to light the scene. I was using the HDRI that came with Carrara called "hdri-25-color W" it is an outdoor scene of the rocky shore and the ocean.

04.29.2008 12:35

Render Man
Member

Join Date: 11.10.2007
Comments: 358

I have some extra time off today so thought I would experiment. I just made a vary similar scene to the one above and tried some different settings on the rendering. I did not get the debris which is around the red board and the board on the bottom left which seems to be a problem in this render above. I have not see this before and wonder what the causing this?

I rendered the first one with hdri and the light setting was to low. The second I tried to compensate with the ambient light and the scene was brighter and in the third I turned off the ambient and turned up the hdri and received much better results. In short you are correct the hdri does not need the ambient light plus you get a sharper or clearer picture.

04.29.2008 18:16

davidbrinnen
Admin

Join Date: 01.03.2004
Comments: 2224

The most likely source of the "debris" would be the indirect lighting I suspect, in my own experiments, the dark spotches alighted quite closely with the photon map. Greater photon count seems to be the fix, but maybe there is a better solution.

04.29.2008 18:24

rashadcarter1
Admin

Join Date: 06.04.2006
Comments: 2610

Hmm. Yeah, likely David you are correct. The photon map accuracy would need to be higher in order for light to reach those corners. Although conversly, one could employ ambient glow as a shortcut for that higher photon setting. I think that would be a poor choice but I can imagine ambient is often used. There is no way that one could not love Carrara. Indeed the lighting settings are not so difficult to understand and grasp once one understands basics of direct and indirect lighting. Ideally maybe Bryce would be a good training ground for the mechanics of bouncing light but Bryce will likely never be as elegant as Carrara in the final comparison. Carrara could be the Bryce killer if it was more fun to use but as is I think Bryce will always be around. Bryce can do all the same stuff but in a more crude manner.

04.29.2008 19:07

Horo
Admin

Join Date: 05.26.2004
Comments: 4721

Well, apart from creating HDRI's for Carrara use and having rendered some promo pictures with them, I just can't get the hang of Carrara. Maybe it is superior as far as lighting is concerned, but it is a very awkward piece of software to use and get results.

It appears to me that the blurry backdrop is the same you've used for Chatty Kathys - which reminds me that Carrara is lightyears behind Bryce as far as IBL/HDRI is concerned. The only positive point I can make is that it handles huge probes like 8000 x 4000 pixels without problems while using a 6400 diameter probe in Bryce is over the limit of what it can savely handle.

04.29.2008 19:26

rashadcarter1
Admin

Join Date: 06.04.2006
Comments: 2610

I agree totally that IBL is not necessarily Carrara's strongest attribute. In this case it was not quite the same probe as Chatty Kathys because of the aspect ratio. I cropped the Carrara version to produce the proper aspect ratio and in doing so I cut off the sky at the top and the bright white cement from the bottom. Most of what is in view is the red brick of the house. I think a bit of the magic of Chatty Kathys may come from the bright cement below the women's faces. What I like about Carrara IBL is that producing probes is much easier because there is no distortion to worry about.

04.29.2008 19:42

Horo
Admin

Join Date: 05.26.2004
Comments: 4721

Yes, Carrara wants equirectangular HDRI's while Bryce insists on angular maps. But you have to rotate the whole scene with the camera to align it to fit the HDRI (background and light), you cannot leave the scene alone and rotate and tilt the HDRI as in Bryce.

If you create your HDRI's in equirectangular projection in the first place, you have a much easier life. When done, transform it to the angular map projection for Bryce. Fiddling around in the angular map projection is indeed most teddious and error prone.

Yes, it was the bricks that made me think it is part of the same background.

04.29.2008 20:19

rashadcarter1
Admin

Join Date: 06.04.2006
Comments: 2610

Oh I see what you mean. Absolutely Bryce has an upperhand. The positioning controls on Bryce IBL are amazing and very very clever and useful. Carrara would benefit from such a feature. Bryce wins.

04.29.2008 20:32

Render Man
Member

Join Date: 11.10.2007
Comments: 358

I don't mind Carrara as I have used it since it was Ray Dream Studio so I did not know any difference as I had nothing to compare it with at the time. The main thing I did not like was all the different methods of modeling. I found Hexagon to be a great tool after most of the bugs were worked out.

I am certainly not going to say which program is the best as this territory has already been traveled and am not sure if there were any winners. I am interested in Bryce for the terrains, volume, and nice renderings. And I will even like it for lighting when I get a handle on it.

04.29.2008 22:21

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