Translucent material (a sheet of paper) with an image texture?
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Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
- infinityeternity
- Posts: 8
- Joined: Fri Feb 15, 2019 11:19 pm
Translucent material (a sheet of paper) with an image texture?
Hello. How to create such a translucent material (a sheet of paper) with some image texture? In the photo I'm directing the sheet towards a lamp and able to read what is printed on another side. Is it possible to do this with LuxCoreRender in Blender?
Last edited by infinityeternity on Sat Feb 16, 2019 7:11 am, edited 1 time in total.
Re: Translucent material (a sheet of paper) with image texture?
You will have to give the mesh a thickness (e.g. solidify modifier) and assign two different materials on both sides.
Make both materials matte translucent, but give them different diffuse and transmission textures.
Make both materials matte translucent, but give them different diffuse and transmission textures.
Re: Translucent material (a sheet of paper) with an image texture?
Here's an example scene.
- Attachments
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- paper.zip
- (412.24 KiB) Downloaded 161 times
- infinityeternity
- Posts: 8
- Joined: Fri Feb 15, 2019 11:19 pm
Re: Translucent material (a sheet of paper) with an image texture?
I've tried to do this with the same texture as in the photo and it doesn't seem to work properly. I've get some weird inverted shading. Symbols appear lighter than the rest of the sheet. What might cause this?
- Attachments
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- paper.zip
- (969.65 KiB) Downloaded 148 times
Re: Translucent material (a sheet of paper) with an image texture?
we need a doublesided material for this. It is not currently possible using shaders in luxcore imho.
Re: Translucent material (a sheet of paper) with an image texture?
Did you plug the texture in both reflection and transmission color?
- infinityeternity
- Posts: 8
- Joined: Fri Feb 15, 2019 11:19 pm
Re: Translucent material (a sheet of paper) with an image texture?
the problem is that your texture is completely white (1), while my texture is grey in the bright parts.
This means your texture reflects ALL the light in the bright parts, so nothing can be transmitted. But in the darker parts (the text), not everything is reflected, so some light can shine through, creating the "inverted" effect.
The solution is to set the brightness of the imagemap to something lower, I used 0.7 below.
I also disabled the fill light to make everything more clear and made the mesh a bit thinner by scaling it.
This means your texture reflects ALL the light in the bright parts, so nothing can be transmitted. But in the darker parts (the text), not everything is reflected, so some light can shine through, creating the "inverted" effect.
The solution is to set the brightness of the imagemap to something lower, I used 0.7 below.
I also disabled the fill light to make everything more clear and made the mesh a bit thinner by scaling it.
- Attachments
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- paper2.zip
- (494.41 KiB) Downloaded 155 times
- infinityeternity
- Posts: 8
- Joined: Fri Feb 15, 2019 11:19 pm
Re: Translucent material (a sheet of paper) with an image texture?
Thanks for your help and good explanation
I added a little bit of emission. This is a hack, but there seems to be a lack of transmitted luminosity without that. Could there be a physically based way to do this?
I added a little bit of emission. This is a hack, but there seems to be a lack of transmitted luminosity without that. Could there be a physically based way to do this?