Fisheye lens - Polyloop

remi · 14th November 2007, 01:17

Hi,

I would like to render a 3D scene together with a Fisheye lens effect. I'm using Carrara 5 Pro. Do you know some tips how to create such a effect?

Remi

Thomas · 14th November 2007, 10:48

Except creating a real lens mesh in front of the camera, I don't think you can do it with the camera settings....

bwtr · 14th November 2007, 13:19

Some serious effects when the Zoom lens is set at 6mm. You will find experimenting some fun.

remi · 15th November 2007, 18:06

Great ideas. I will try it.

Thank you both, Thomas and bwtr.

Remi

remi · 16th November 2007, 12:39

Thank you Thomas and Brian for your ideas.
I've tried it and the idea with the lens in front of the camera comes out nice.

Remi

PS: Yesterday, I sent a answer already. But it seems, my post is lost in the moderation queue.

bwtr · 17th November 2007, 01:30

Hope you will show us examples of your results.

julvr · 19th November 2007, 20:53

Thomas -- you mentioned using a mesh lens... I would think using an formula would give you a much nicer result

I just tried it and it seems to work great -- take two formula objects with the following formula:

x=(v-0.5));
y=(u-0.5) ;
r=sqrt(x*x+y*y);
z=(-(cos(r) * 0.6)+0.5);

Flip one of them to be opposite of the other such that the concave sides face outwards -- give them both glass shaders, and position them in front of your camera.

John

Thomas · 20th November 2007, 00:34

I'm not a master in Carrara math editor and the question wasn't from me

Canyou post a sample please?

rickei · 20th November 2007, 01:12

I'll have to try that.

I had to do this a few years ago...i pointed the camera in the opposite direction and put a sphere with 100% reflection directly in front of the camera... make sure you turn off cast and receive shadows on the sphere

bwtr · 20th November 2007, 01:38

I remember that one---NOW!
There are so many solutions to ideas/problems with Carrara that no-one could remember even if you had saved them (which I have--somewhere!)

julvr · 20th November 2007, 15:43

After a bit more investigation, the formula solution I suggested doesn't work -- you end up getting the same wavy look you get with polymeshes (at least in C4 -- I don't have C6 at work, but I imagine it works exactly the same). Reflecting off the sphere is likely your best bet.

bwtr · 20th November 2007, 23:19

Would taking the lenses into the vertex room and increasing the number of vertices improve the smoothness perhaps?

bwtr · 21st November 2007, 03:59

Does this work as a usable lens for you?

bwtr · 21st November 2007, 06:00

Here is another lens idea which "may" be fun to work with.

14th November 2007, 01:17	#1 (permalink)
remi --- Join Date: Jun 2006 Location: Paderborn, Germany Posts: 3	Fisheye lens Hi, I would like to render a 3D scene together with a Fisheye lens effect. I'm using Carrara 5 Pro. Do you know some tips how to create such a effect? Remi

14th November 2007, 10:48	#2 (permalink)
Thomas Always learning new stuff Join Date: Jul 2002 Location: Merignac, France Posts: 11,225	Except creating a real lens mesh in front of the camera, I don't think you can do it with the camera settings.... __________________ Polyloop owner & Administrator - no support by PM or email. Polyloop [EN/FR] - Meuuh [FR +16 ans] - Totyo [FR] - Pixologic [JOB] - Le ZBlog [JOB] - La3dpourlesnuls [FR]

20th November 2007, 00:34	#8 (permalink)
Thomas Always learning new stuff Join Date: Jul 2002 Location: Merignac, France Posts: 11,225	I'm not a master in Carrara math editor and the question wasn't from me Canyou post a sample please? __________________ Polyloop owner & Administrator - no support by PM or email. Polyloop [EN/FR] - Meuuh [FR +16 ans] - Totyo [FR] - Pixologic [JOB] - Le ZBlog [JOB] - La3dpourlesnuls [FR]

20th November 2007, 01:12	#9 (permalink)
rickei Respect the Dawg! Join Date: Dec 2005 Location: USA - Conway, South Carolina Posts: 786	I'll have to try that. I had to do this a few years ago...i pointed the camera in the opposite direction and put a sphere with 100% reflection directly in front of the camera... make sure you turn off cast and receive shadows on the sphere Attached Thumbnails

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14th November 2007, 13:19	#3 (permalink)
bwtr Brian Join Date: Jul 2005 Location: South Australia Posts: 2,089	Some serious effects when the Zoom lens is set at 6mm. You will find experimenting some fun.

15th November 2007, 18:06	#4 (permalink)
remi --- Join Date: Jun 2006 Location: Paderborn, Germany Posts: 3	Great ideas. I will try it. Thank you both, Thomas and bwtr. Remi

16th November 2007, 12:39	#5 (permalink)
remi --- Join Date: Jun 2006 Location: Paderborn, Germany Posts: 3	Thank you Thomas and Brian for your ideas. I've tried it and the idea with the lens in front of the camera comes out nice. Remi PS: Yesterday, I sent a answer already. But it seems, my post is lost in the moderation queue.

17th November 2007, 01:30	#6 (permalink)
bwtr Brian Join Date: Jul 2005 Location: South Australia Posts: 2,089	Hope you will show us examples of your results.

19th November 2007, 20:53	#7 (permalink)
julvr Vertex Join Date: Nov 2006 Posts: 25	Thomas -- you mentioned using a mesh lens... I would think using an formula would give you a much nicer result I just tried it and it seems to work great -- take two formula objects with the following formula: x=(v-0.5)); y=(u-0.5) ; r=sqrt(xx+yy); z=(-(cos(r) * 0.6)+0.5); Flip one of them to be opposite of the other such that the concave sides face outwards -- give them both glass shaders, and position them in front of your camera. John

20th November 2007, 01:38	#10 (permalink)
bwtr Brian Join Date: Jul 2005 Location: South Australia Posts: 2,089	I remember that one---NOW! There are so many solutions to ideas/problems with Carrara that no-one could remember even if you had saved them (which I have--somewhere!)

20th November 2007, 15:43	#11 (permalink)
julvr Vertex Join Date: Nov 2006 Posts: 25	After a bit more investigation, the formula solution I suggested doesn't work -- you end up getting the same wavy look you get with polymeshes (at least in C4 -- I don't have C6 at work, but I imagine it works exactly the same). Reflecting off the sphere is likely your best bet.

20th November 2007, 23:19	#12 (permalink)
bwtr Brian Join Date: Jul 2005 Location: South Australia Posts: 2,089	Would taking the lenses into the vertex room and increasing the number of vertices improve the smoothness perhaps?