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Spannerhead

Why do my lights shine through objects?

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Had this issue ever since 6.5, and I was hoping they would have fixed it for 8.6...  Maybe I'm doing something wrong though?

See attached images.  My display has two rows of 5 point lights.  75% intensity.  They shine THROUGH half the objects on the display (like on the top surface of the base module at the back---that area should be completely in the dark but it's lit up like there's a light right next to it...).

Any insight would be super helpful.  Would be SO nice to be able to create lighting "in camera" rather than fudging it in Photoshop after the fact.....

Screen Shot 2018-11-09 at 2.30.55 PM.png

Screen Shot 2018-11-09 at 2.30.49 PM.png

Screen Shot 2018-11-09 at 2.30.32 PM.png

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7 minutes ago, Andrew West said:

Sure looks like you have shadow casting turned off in your light setting. It needs to be enabled for all your lights. 

Thanks, but here it is with shadow casting on.  The top of the bottom row of bins should be lit up, and there's no reason the reflective floor should be totally blown out like that.  And I don't see any evidence the top lights are turned on at all.

Screen Shot 2018-11-09 at 2.51.22 PM.png

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Hi, did you check that your bottom reflective floor is receiving shadows? It look that this option is turned off in their attributes...

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Are you using V-ray or just straight RenderZone?  If using V-ray I would forget about point lights and use a flat plane or a mesh light.   Much simpler and easy to control.  Better still if you have the time your project would benefit from Maxwell but that is much more of a commitment. 

It certainly still looks like you have issues with shadow casting and receiving in both your lights palette and your materials. 

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On 11/13/2018 at 1:59 PM, Andrew West said:

Are you using V-ray or just straight RenderZone?  If using V-ray I would forget about point lights and use a flat plane or a mesh light.   Much simpler and easy to control.  Better still if you have the time your project would benefit from Maxwell but that is much more of a commitment. 

It certainly still looks like you have issues with shadow casting and receiving in both your lights palette and your materials. 

Straight RenderZone.  Would prefer to do everything in formZ if possible.  I know V-Ray and Keyshot are great rendering programs, but I really think RenderZone should be able to at least get the basics right so that lights don't shine through objects.

Still dealing with this issue.  Here's the latest example.  I have a line light with a 1/2" radius inside my display.  Colored green.  And it shines through objects as shown, and doesn't cast shadows for the headphone arms (among other places).

Any insight?  I've been adding lights in post-processing in Photoshop for YEARS and would love the flexibility to be able to add them "in camera."

Thanks all.

 

Capture1.PNG

Capture2.PNG

Capture3.PNG

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Judging by these images, it looks as though your displays are letting light pass through the back-faces. Only one side of a face will block light, the other ends up "invisible." You can test this theory by creating a cube, then using the Reverse tool on it.

This is essentially what you have, an intricate "box" with a light inside:

 

262946413_ScreenShot2019-06-11at11_14_14AM.jpg.4fc072d11a0e082a6cf12baddb9ce654.jpg1214328272_ScreenShot2019-06-11at11_14_42AM.jpg.eee8bcbe56849436c140064a37ee143d.jpg

 

You can see that the light leaks out through the cube, because there is no face to catch the light. To fix this, I'll need to create inward-facing faces. The easiest way to do that is by using the Thicken tool. Once the object has thickness, it will block the light.

553461761_ScreenShot2019-06-11at11_15_54AM.jpg.4a855ac0eb80943c2a6461fdacce3636.jpg1004420840_ScreenShot2019-06-11at11_18_04AM.jpg.304fd006d418494d5d13aee10e67973c.jpg

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Thank you for the reply.  This is the most thoughtful reply I've gotten to this issue for ages.  And I've been using formZ professionally and working around this problem for well over 10 years.

Unfortunately, while the insight about faces is helpful, it doesn't solve the problem.  The light is not "inside" anything (it's located behind a shroud with a 1/16" thickness) and everything in the model has a thickness to it.

Changing the shadow type on the line light to Hard (Raytraced) helps some, but as you can see below, the light still shines through the black base and reflects off the floor.

Thank you again.

Capture.PNG

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Okay, I wasn't able to make out the thickness from the above images. 

Could we get you to send that to support@formz.com for us to investigate more closely? 

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Sent.  FYI this is an issue I've been dealing with for YEARS, ever since I started using formZ professionally with version 6.5.  Lights shining through objects, even with thicknesses.  If there's a "trick" I'm missing, I'd love to hear what it is!  Thank you!

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So...Support helped me to bandaid the issue by changing the reflectivity parameters of the floor.

Still no permanent, universal solution for why lights shine through objects even WITH thicknesses on everything and why lights (point, cone, line, etc) fail to illuminate surfaces they're RIGHT NEXT TO.

Edited by Spannerhead

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