Author Topic: [Answered] Alpha Channel problem  (Read 38 times)

marseca

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[Answered] Alpha Channel problem
« on: August 14, 2019, 12:12:35 pm »
August 14, 2019, 12:12:35 pm
Hi,
I'm writing here because I don´t find a category for questions.
I need to export a render without floor. I start with white scene and import my project there. When I export a render, the program has "save the sky alpha" option but I need to save the "floor alpha" too.
Another option of the program is to save de ID material and remove the floor with Photoshop, but my work is very complicated, it has lots of ropes and the resolution of the render and the ID material It isn´t enough for me.
Is there any solution?
I attach an example.
Thank you



Re: Alpha Channel problem
« Reply #1 on: August 14, 2019, 12:25:58 pm »
August 14, 2019, 12:25:58 pm
I'm writing here because I don´t find a category for questions.

Hi marseca, that's because the much bigger forum is hidden until you register a License Key. Please ask your colleague Pedro to make the License Key number available to you, so that you can register it on your Profile page.

I need to export a render without floor. ... When I export a render, the program has "save the sky alpha" option but I need to save the "floor alpha" too. ... Another option of the program is to save de ID material and remove the floor with Photoshop

Using selection masks to combine the Material ID output map and the Sky Alpha output map in Photoshop is one way of achieving it.

However, it's probably easier to place a single model with a single material behind the model you want to isolate in Photoshop. The model should cover both the Lumion Landscape and the sky. You can then render a Material ID output map and remove it in Photoshop.

Let us know if you've got any other questions.
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