Hi All!

I tryed here to place a car in a HDRI environment so, that the shadow of the
car seems to lying on the ground of the HDRI. I cann't get it on the direct
way, so i render the car, the environment and the shadow separatly and then
compose it in The Gimp. What do you mean, is that succeeded, is that looks
realistic? Is there an another way to do this?

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Attachments:
Download 'chrysler_klein.jpg' (30 KB)

Preview of image 'chrysler_klein.jpg'

I can't quite put my finger on it, but something's not right with the way
the textures are around the headlights - the car itself looks somewhat
"cartoony" in how the highlights are on it and such.

Jim

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Hello. I agree with Jim about the headlights. The scene as a whole looks 
good, but the texture on the ground is blurry near the tires. You might 
try to make a box on which the car sits, and try to blend that with the 
background. You could blend the box into the background with focal blur. 
  It would take a few test renders, but would be worth it, IMO. At any 
rate, the scene looks good!

~Sam

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Samuel Benge <stb### [at] hotmailcom> wrote:
> Hello. I agree with Jim about the headlights. The scene as a whole looks
> good, but the texture on the ground is blurry near the tires. You might
> try to make a box on which the car sits, and try to blend that with the
> background. You could blend the box into the background with focal blur.
>   It would take a few test renders, but would be worth it, IMO. At any
> rate, the scene looks good!
>
> ~Sam

The best way to do this is to center the spherical mapping at the camera
location.

-tgq

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Trevor G Quayle wrote:
> Samuel Benge <stb### [at] hotmailcom> wrote:
>> Hello. I agree with Jim about the headlights. The scene as a whole looks
>> good, but the texture on the ground is blurry near the tires. You might
>> try to make a box on which the car sits, and try to blend that with the
>> background. You could blend the box into the background with focal blur.
>>   It would take a few test renders, but would be worth it, IMO. At any
>> rate, the scene looks good!
>>
>> ~Sam
> 
> The best way to do this is to center the spherical mapping at the camera
> location.
> 
> -tgq

No, no, I'm talking about the fuzziness of the HDR image.... centering 
the HDR image at the camera location helps, but won't make it any 
sharper. Since the light probe is a certain size (in pixels) there will 
always be blending between pixels, causing the image to look fuzzy. A 
higher-res light probe would fix it, but these aren't always available. 
Scaling the whole composited image down would also do the trick, but 
small images aren't much fun to look at.

The best thing I can think to do is model a ground object with a new 
texture, and blend it into the HDR image using focal_blur. The 
blur_samples don't even need to be high.... a value of 10 would work.

~Sam

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Jim Henderson <nos### [at] nospamcom> wrote:
> I can't quite put my finger on it, but something's not right with the way
> the textures are around the headlights - the car itself looks somewhat
> "cartoony" in how the highlights are on it and such.
>
> Jim

I don't talking about how the scene looks. I asking how to drop a shadow in
a sherical HDRI environment. Also, what do u say? how do U do it?

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Here is a little update with better materials/textures. Can anybody help me
to create a shader for car paint and rims?

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Attachments:
Download 'chrysler (medium).jpg' (44 KB)

Preview of image 'chrysler (medium).jpg'

I think Flyerx had a small tutorial on it.
http://mysite.verizon.net/sfg0000/
Poke around..

The idea was that you take a plane and give a
almost transperant texture. That way it will recieve
shadows but also interact with the back ground.

In other software packages like 3ds Max and so on
you have something called a matte material.
This material can cast and recieve shadows and so on
but otherwise it doesn't interfear with the scene in
any way. Quite useful. That is one way they incorporate
CG with live shots like in Starwars e t c.


Stefan


"SmartDen" <nomail@nomail> wrote in message 
news:web.4513a528b592cdc578e8d7530@news.povray.org...
> Hi All!
>
> I tryed here to place a car in a HDRI environment so, that the shadow of 
> the
> car seems to lying on the ground of the HDRI. I cann't get it on the 
> direct
> way, so i render the car, the environment and the shadow separatly and 
> then
> compose it in The Gimp. What do you mean, is that succeeded, is that looks
> realistic? Is there an another way to do this?
>
>

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