back-light plastic/satinate material

[Shape]

3d max 1014

I've been fighting for a long time with this, but I still haven't got any results worthy of being posted.

panel 3000x2000x10 mm I use a base material of autodesk, transparent polycarbonate, color change, I change the transparency to make it "satinate", then I hang behind two photometric lights on the sides to simulate two neon/led tubes (modifying its shape in cylinder and giving the amine equal to the panel) and imposed the display of light in the scene.

up here also wrinkled a little bit well.

I see the panel, I see the two "tubes" in transparency but also setting ufo brightness values the panel is illuminated only on the side strips, I try .

what I would like to simulate is instead a diffuse brightness of these two "tubes" that must be visible as an illuminating source, but they must also illuminate the scene, but illuminate the panel only on the side bands.

I don't really understand where I'm wrong.

Moreover I would like to understand how to act on the parameters of transparency so that the material becomes transparent but keeping the shade, i.e. if imposed a light blue as diffuse color, when the transparency changes to shades, going on darker shades of blue/gray.


mental use ray, but if I have to use other well some suggestions come.

everything to simulate coatings with daylight, and night backlight, changing only the settings of the sun.

I solved it provisionally by joining the lights on board a self lighting of the material but it is not what I would like, also because here the values I have to set are really throw them to the c___o.

Thank you in advance for your suggestions.

 

[lattu]

I personally don't have a great feeling with photometrics. If I may prefer not to use them. what I know is that they only work with the active dayligth system but it's complicated to set them up if you don't have lighting knowledge

 

[lattu]

you should post some image (although they are not beautiful) to understand which mistakes to correct, otherwise you go a little blind

 

[lattu]

just to give you an example, I created this simple scene where I inserted a cube and a plane mapped with two arch&design materials, I inserted two sky ligth photometrics below the plane and the material I assigned in the refraction fast (interpolate) and a transparency of 0.4. increasing the value of fast increases the width of the band with a blurring effect.

I don't know if you approach your situation far, but I can point out that the wall at the base receives part of the lighting generated by the nearest sky portal, so increasing the intensity of the photometrics you should also accentuate the ambient lighting.
The thing I don't understand and I can't get rid of is those "taches" in the illuminated band.

right to understand are you working in an interior or outside?

 

[lattu]

in this closed environment the effect is more evident. then depends on the size of the setting you want to light up

 

[Shape]

Thank you very much,
I'll get you an image and parameters, so maybe you can help me figure out where I'm wrong.
as you see at one point I arrived, but I don't understand why the lights remain "captured" and do not spread both on the center of the panel, and in the scene.

Moreover, as you will see from the parameters, the material has a 70% transparency, I would need to lower the parameter because it is a semi-transparent type satin glass, but if lower the parameter of transparency worsens the diffusion of light.

in the scene there are no other lights, that obviously in reality there would be, but I wanted to find the parameters of the material/lights, then I set up with the ambient lights.

 

[lattu]

One should understand in reality how a panel of such dimensions would be illuminated (3m x 2) with only 2 neon on the sides.
In my opinion the effect you got is quite realistic and probably to achieve more homogeneous lighting you should add some light to the center of the panel.
I also think that for advertising signs plastics are used that diffuse light inside them (optical fibre type), but I doubt a similar effect is reproduced.
Let's see if anyone can solve this problem, I don't!

 

[Shape]

Thank you very much, I was demoralizing.
the fact that cmq the result obtained is decent m, i raises, and the fact that you do not know how to go much beyond this I flatter myself:wink:.

I trust in some suggestions from some other user