Author Topic: Window has no reflaction  (Read 4086 times)

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Offline Zvi

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Window has no reflaction
« on: June 25, 2016, 04:46:05 pm »
Although there is a Glass Window material on the windows they looked just black without reflections of the environment Hdr image, as you can see in the attached image.

Offline Chad Holton

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Re: Window has no reflaction
« Reply #1 on: June 26, 2016, 05:35:27 am »
I see a reflection in the 1st floor glass. Maybe your HDR has a lot of black on that side. Try a stock outdoor HDR to see if it makes a difference.

Offline Zvi

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Re: Window has no reflaction
« Reply #2 on: June 26, 2016, 11:16:21 pm »
I see a reflection in the 1st floor glass. Maybe your HDR has a lot of black on that side. Try a stock outdoor HDR to see if it makes a difference.
I tried a lot of HDR images, but I have not seen any improvement. Maybe someone can upload an HDR image which solve this problem.

Offline richardfunnell

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Re: Window has no reflaction
« Reply #3 on: June 27, 2016, 06:25:45 am »
You may want to enable the "Product" Lighting preset. This ensures that you have Global Illumination enabled, as well as a higher ray bounce value.

Offline Zvi

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Re: Window has no reflaction
« Reply #4 on: June 27, 2016, 06:39:05 am »
You may want to enable the "Product" Lighting preset. This ensures that you have Global Illumination enabled, as well as a higher ray bounce value.
As you can see in the attached screenshot there is already GI and a lot of raybounces.

Offline Chad Holton

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Re: Window has no reflaction
« Reply #5 on: June 27, 2016, 06:50:41 am »
Hello,

Would you be able to share the scene? If so, please send us the ksp file.  To save  a ksp file:

1.  Open your scene
2.  Go to File > Save Package
3.  Name your file

You can send the file securely via keyshot.wetransfer.com to: [email protected]

Chad

Offline Zvi

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Re: Window has no reflaction
« Reply #6 on: June 27, 2016, 12:57:50 pm »
Finally I found an HDR image that causes reflections. This appears to be a serious challenge.























HDR image found suitable, that causes reflections. This appears to be a serious challenge.

Offline Speedster

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Re: Window has no reflaction
« Reply #7 on: June 27, 2016, 03:24:31 pm »
There's another trick, but it may be difficult with an arch model. 

Bring in a vertical plane.  Apply a JPEG of your choice. Move it around until the JPEG reflects in the glass.

Of course the plane has to be just out of the camera sight lines.

Bill G

Offline Zvi

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Re: Window has no reflaction
« Reply #8 on: June 27, 2016, 03:41:22 pm »
There's another trick, but it may be difficult with an arch model. 

Bring in a vertical plane.  Apply a JPEG of your choice. Move it around until the JPEG reflects in the glass.

Of course the plane has to be just out of the camera sight lines.

Bill G
Thank you. But there should be a way to make the plane with the image to be invisible, and to affect only the reflections on the windows, and without shadows.

guest84672

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Re: Window has no reflaction
« Reply #9 on: June 27, 2016, 04:27:54 pm »
Use the emissive material and leave the intensity at 1.

Offline Chad Holton

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Re: Window has no reflaction
« Reply #10 on: June 28, 2016, 07:30:28 am »
Thanks for sending your file. I just checked it out and see that you're using the default environment, which will not reflect a sky. Are you confusing the backplate and environment perhaps?

Try this:

- Go to the Library>Environment tab and under the Outdoor folder, drag and drop in one of those (to reflect a sky)
- Now, go to the Project>Environment tab, adjust the size and height slider to taste

Also, if you want the glass to reflect the environment a bit more, adjust the window's (glass material) refraction index to a higher value.

Here's my result: