Singularities treatment

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Permalink Reply by Alain Bonnefoy on February 2, 2011 at 2:50pm

hum well, after more than 5600 passes, I'm still wondering if this reflection is really opportunely and how it's suppose to be rendered.

 

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Permalink Reply by Render Plus on February 4, 2011 at 6:30am

I supose I'm going to suggest a very hard feature but wouldn't it be possible to detect such singularity and concentrate the calculation on this areas at a moment? (well ok, when?)

 

I don't understand why the reflections on your wall are large rectangles.  Do these represent rectangular bricks?

 

Try zooming into just the small area to see what it looks like when rendered by itself.

 

(Unfortunately, when you "zoom" in SketchUp, it zooms by moving the camera in, which results in a different view. You would need to zoom and change the Field of View to get exactly the same image. I have placed a post on the SketchUp Community Forum to see if there is a ruby which will zoom into an area better. Post)

 

You can render just a part of the image, and then paste it into the other image later. Just Zoom in on that area in SketchUp. If you could zoom in properly, and render it to a smaller resolution the "singularity" would render much faster.

 

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Permalink Reply by Alain Bonnefoy on February 4, 2011 at 7:15am

Hello Al,

 

Of course, I'm just talking about the small area in the red circle (1st image) and not the yellow rectangles along the wall.

The small area seems to be the reflection of the yellow car but I'm a bit surprised to this reflection so visible.

 

I'm going to render this small are by zooming as you suggest, to see.

 

thanks,

Al Hart said:

I supose I'm going to suggest a very hard feature but wouldn't it be possible to detect such singularity and concentrate the calculation on this areas at a moment? (well ok, when?)

 

I don't understand why the reflections on your wall are large rectangles.  Do these represent rectangular bricks?

 

Try zooming into just the small area to see what it looks like when rendered by itself.

 

(Unfortunately, when you "zoom" in SketchUp, it zooms by moving the camera in, which results in a different view. You would need to zoom and change the Field of View to get exactly the same image. I have placed a post on the SketchUp Community Forum to see if there is a ruby which will zoom into an area better. Post)

 

You can render just a part of the image, and then paste it into the other image later. Just Zoom in on that area in SketchUp. If you could zoom in properly, and render it to a smaller resolution the "singularity" would render much faster.

 

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Permalink Reply by Render Plus on February 4, 2011 at 7:17am

The small area seems to be the reflection of the yellow car but I'm a bit surprised to this reflection so visible.

Reflection of the sun can be very bright.

 

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Permalink Reply by Alain Bonnefoy on February 4, 2011 at 12:08pm

well, I guess zooming and changing field of view shouldn't be very easy to do and there is another problem here; the global iamge tone is different as obviously, the closer we are from the surface, the brighter it is.

So, I tried to zoom so, sure the calculation is much faster but..... how many months to get the expected result?

Here after 47 mns and 2780 passes:

Al Hart said:

The small area seems to be the reflection of the yellow car but I'm a bit surprised to this reflection so visible.

Reflection of the sun can be very bright.

 

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Permalink Reply by Render Plus on February 4, 2011 at 1:35pm

Are you using the Path Tracer or Packet Mode.

 

Photometrics brightens the image, you could use the brightness slider to bring it back down if you wanted to paste it into the other image.

 

I wanted you to zoom in so we could see what we were really looking at.

 

Is this a fancy metal material (with bumps, etc.) if so, you might change it to an easier metal to render.

 

You didn't expalin why we are getting rectangles in the other reflections.

(I wanted to know so that I could understand your model better)

 

Do you really need reflection on this surface?

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Permalink Reply by Alain Bonnefoy on February 5, 2011 at 3:10am

Hi Al,

I don't want to talk about rectangles here as it's a frontage made by plaques of different colors.

 

Again my problem only concerns the reflection of the yellow car, just on the right of the corner which seems to never converge.

Below at 8790 passes:

The material is set to intensity 0.25 and sharpness 0.2 to try to render the real material characteristics.

 

Regards,

 

Al Hart said:

Are you using the Path Tracer or Packet Mode.

 

Photometrics brightens the image, you could use the brightness slider to bring it back down if you wanted to paste it into the other image.

 

I wanted you to zoom in so we could see what we were really looking at.

 

Is this a fancy metal material (with bumps, etc.) if so, you might change it to an easier metal to render.

 

You didn't expalin why we are getting rectangles in the other reflections.

(I wanted to know so that I could understand your model better)

 

Do you really need reflection on this surface?

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Permalink Reply by Alain Bonnefoy on February 7, 2011 at 8:38am

Ok, 64000 passes, I won't see the end. I give up.

Regards,

Alain

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