dining table

lar111 · Post by **lar111** » Tue Oct 30, 2007 3:44 pm

The rainbow caustics are strange I thought, I don't have cauchy enabled. And its a very basic glass. Just a transparent material, with rgb of 0.8 0.8 0.8. It was a total fluke that I got the right angle ect. I didn't think that dispersion like that wasn't possibly without having cauchy enabled. I'm always learning something new about indigo.

I did a material test overnight trying to find a decent soup, heres my first attempt. I tried putting some parsley on top. It looks black ? The parsley is a diffuse transmitter blend with a null.

Kram1032 : I'm actually using the new camera tone mapping, and I like the look of it. Unfortunatley that means that I can't use violet to do any post pro, without losing the camera tonemapping. I do agree a little bit of bloom would be nice. I have super sampling set at 1 for my test renders, would you suggest 2 or higher when I go for a final render. Do you like my soup, I tried to roughly match the colours in that link you showed

WytRaven · Post by **WytRaven** » Tue Oct 30, 2007 4:16 pm

not a total fluke. You must have had cauchy above 0 as indigo will not trace paths for independent wavelengths of light with cauchy = 0. Therefore with cauchy = 0 "rainbow effect" is absolutely impossible.

lar111 · Post by **lar111** » Tue Oct 30, 2007 4:27 pm

No, thats whats I find really weird about it. I didn't have cauchy enabled, ie it was set at zero. I have only ever used cauchy once for a diamond render I did and it slowed down the render so much that I won't use it again, yes I have a slow pc. I am going to try and recreate the image again. Unfortunatley I didn't save the file

Kram1032 · Post by **Kram1032** » Wed Oct 31, 2007 12:36 am

the soup is very nice

- With the link, I just wanted to point out, that soup doesn't have to be thick and creamy

Some are even clearer than the one, I posted

I hope, someone will update violet, soon. Noone is really interested in coding open sourced stuff, in this forum, it seems...

The parsley doesn't look black, it's green

For the final result, you should really use ssf above 1... 2 is fine, usually. Just in very extreme contrast scenes, you might need higher values

lar111 · Post by **lar111** » Fri Nov 09, 2007 8:57 pm

I finally got around to doing a decent sized render of this scene. I let it go for nearly 70 hours, got up to 9500 samples. But the candles just don't seem to want clear up. This render is sort of finished. I am not calling it finished completley. I think I might eventually go back to it and model a resturant around it, or maybe a cafe and use a exr for the background. The biggest thing I don't like about this image is the lighting. I tried different sorts of setups, but I wanted the candles to be the main source of lighting. To me it just seems a little flat.

Kram1032 · Post by **Kram1032** » Sat Nov 10, 2007 1:04 am

It's great, really

Did you use chromatic dispersion, now, or is the effect still mysterious?

lar111 · Post by **lar111** » Sat Nov 10, 2007 4:25 pm

Hey thanks Kram1032, glad you liked it. I don't have cauchy enabled, and its not really chromatic dispersion that is appearing in those renders. It looks like it sure, but what is really happening is that you are seeing the image of my candle flame being distorted and projected onto the surface. The candle flame is a textured emitter, a rough gradient going from bottom to top I have Blue. red, orange, yellow, white, yellow, orange, red. It was just a bit of luck that my flame colours were roughly the same as a rainbow. ( notice there is no green showwing in the Refracted imge). So if i remove the texture from the emitter I lose the "fake dispersion". Still, I think it looks cool. But it had me scatching my head for a while

WytRaven · Post by **WytRaven** » Sat Nov 10, 2007 4:42 pm

Nice trick!

Kram1032 · Post by **Kram1032** » Sun Nov 11, 2007 2:40 am

cool

Indigo is realistic enough to render fake-candles' refractions as dispersion xD

you flame map must be pretty good, but too uniformly bright or something.

That would be missing: an emission map!
(Or does it exist? O.o)
additionally to the colour map, you get something, that's differently bright in different regions

- or the possibility of 32bit maps

(Oh, and obviously, volume emitters should do a great job with flames, too

)

lar111 · Post by **lar111** » Sun Feb 24, 2008 4:28 pm

I finally got around to putting the dining table in a resturant scene...I got two versions to show, one is a camera tonemapped image with a slight amount of levels adjustment in photoshop and the second is the same image but using reinhard tonemapping in violet. I am not sure which one I like best at the moment...I am quite happy with this scene, although the table clothe material is not quite what I was trying to achieve. Which version looks the nicest? Oh and critisms is welcome as always

Labello · Post by **Labello** » Mon Feb 25, 2008 2:28 am

this is wicked!

i would prefer the first version. the floor still needs some work! but i think u know that!

BbB · Post by **BbB** » Mon Feb 25, 2008 3:15 am

Nice.
Check your alpha maps on the leaves of the tree on the left.

lar111 · Post by **lar111** » Mon Feb 25, 2008 6:54 am

Thanks guys, I am trying to find a better texture for the floor still. I have actually modelled the planks and I just need to find a good wood texture for planks, I might try and make my own, I would like a nice jarrah texture if anyone knows where I could find one. Maybe I should just forget about modelling the individual floorboards and just use a floorboard texture on a plane.

And BbB thanks for spotting my mistake with the leafs, don't know what happened there. I had to cut the tree up to get it to export and somehow some parts of the tree got the wrong material applied. Fixed it now ! I have been watching it render for ages and I didn't spot the mistake until you mentioned it.

Is there anything else that I could improve ? Really I would like to hear any suggestions, I am determined to finish this one as best as I can get it. Wish I could do a larger render but it just isn't practical with my pc, as it is this took 55 hours to render on my pc.

Kram1032 · Post by **Kram1032** » Tue Feb 26, 2008 2:59 am

I'd slightly increase aperture size: candle flames are very unlikely to glow that bright, with that much glare...
Else, I second BbB and labello

Vampyre · Post by **Vampyre** » Tue Feb 26, 2008 3:06 am

wow. amazing
both images are excelent. i think i like the first one better though.

the only crit that i have is that everything looks too clean. especially the chair cushins and table cloths. I think they could benifit from a very mild texture with slight color variation, especially the chairs.. where repeated sitting would cause wear and discoloratoin

and if i'm going to nit pick, the leaves on your ivy, at the very top look a bit flat. i think manually rotating a few of those leaves would help a lot.

and its just a personal preference but i think your roses look a little too bright.

all that being said, the whole scene is a lot better than i could ever do, looks awesome already. keep up the great work

dining table

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