DU/Farr Sailing Yacht

[mcvltd]

Nice link RErender, thanks.

[Spikeadeliv]

Shadows

This link is like a conversation I had with a fellow airbrush artist years ago, he stated that in reality when a shadow is cast on very shiny objects they do not show well or at all and looking around me I think he was right.

Unless the object casting the shadow is large, then the shiny object would be in shade rather than shadow?

But in CGI and airbrush worlds it does make things float, same with chairs etc on shiny floors.

Spike

[redi]

Hi mcvltd

You might try using one of the Sachform HDR collections (http://www.sachform.de/index_EN.html) I've found them to be pretty good

[RErender]

But in CGI and airbrush worlds it does make things float, same with chairs etc on shiny floors.

it's an interesting quandary , I had a collection of photographs in which objects were clearly "floating", it happens in real life. It is just that when looking at cgi we become hyper critical. Splotches, color bleed and weird caustics that we would just automatically accept in the real world are questioned in cgi.

[ene.xis]

It is just that when looking at cgi we become hyper critical. Splotches, color bleed and weird caustics that we would just automatically accept in the real world are questioned in cgi.

absolutelly!

[jonahhawk]

Oitech, isn't that image from the movie The Island and is CG anyway? I assumed that boat was CG but I may be way off...

Please excuse my rudimentary boat, this was a quick experiment. You can see that the boat casts a shadow on the water as well as on the sea floor. HDRI is reflected in the water. I also put some dark stones on the sea floor. I cheated the IOR down a bit from reality too.

[jonahhawk]

i guess, realistically you only see the reflection of the shaded side/underside of the boat... but this image is interesting. it sure looks like a shadow to me...
http://www.library.ucsb.edu/internal...w_on_water.jpg

[RErender]

Here is another example http://photo.jhwdesign.com/index.php?showimage=43# but I don't think we are seeing shadows "on" the as much as "in" the water. It appears that the shadows are more apparent the murkier the water is. I think what we are seeing is shadows on the stuff suspended in the water, just like volume light is not apparent in a swimming pools clear water but is in the relatively murkier ocean.

[mcvltd]

I definately think the amount of stuff suspended in the water has the biggest impact on shadows and colour.

Olitechs image shows very clear water with no shadows.

RErender and jonahhawk's images show murkier water with shadows.

But I don't understand how jonahhawk can achieve shadows and transparency. Unless it's something to do with the diffuse colour - I've got mine as black, so the colour is dictacted by what is behind the surface rather than the surface itself. Maybe this has an impact on the shadow? I'll modify my diffuse colour and let you know what happens.

Redi - thanks for the link.

[mcvltd]

ah-ha.. it IS to do with diffuse colour!

The further away from black that you make the diffuse colour, the more apparent the shadows become. See image below-



This was rendered with a dark green diffise colour as opposed to the previous black.

Now I have the choice, shadows or no-shadows

[RErender]

That's good to know, great observation.

[Da_elf]

if you convert an egz glass material to vray material you can see he links his diffuse color with his fog color. thats usually how i go about working on my water. the question i have for the dreamscape users is how do you get your bumps setup. the dreamscape sea bump only seems to work with dreamscape sea material. however that material is slow to use in comparison with the vray material

[olitech]

Oitech, isn't that image from the movie The Island and is CG anyway? I assumed that boat was CG but I may be way off...

jonahawk:
Nope, it's a photo reference...go to the Wallypower website.

My fiancee has a speedboat and only seems to recall seeing shadows under the water's surface...but I'm sure the 'murkiness' would make a huge difference.

Anyway, why don't we just get daElf to go outside and take us some snaps...?

[mcvltd]

[quote="olitech"Anyway, why don't we just get daElf to go outside and take us some snaps...?[/quote]

You may have to tempt him with some rum first.....

Da_elf - I use the dreamscape sea surface for the large, undulating waves and in my vray material I add a mix map in the bump slot comprising several different procedurals (noise, smoke, waves). Seems to do the trick. Probably not as nice as the dreamscape sea bump, but it's the only way I can get a good render at the mo. Haven't tried this bump with animation yet.

[Randy]

here's another reference picture


hard to say what is reflection and what is shadow.

the question i have for the dreamscape users is how do you get your bumps setup. the dreamscape sea bump only seems to work with dreamscape sea material. however that material is slow to use in comparison with the vray material

I'm using a sea surface with a Vray-material.