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Infinite Background Problem
Hello, I haven’t used Cinema 4D in a while, so I didn’t know how much changed during the past few years. Anyway, I was trying to set up a simple scene, with a floor, a background (to create the infinite look) and an HDRI sky for the reflections. In the past this worked perfectly and the reflection from the floor, the background and the HDRI sky were seen on the object. In this new version when I try the same steps as before I get a completely different result. The reflection of the HDRI is somehow blocked by the floor, and the background is not even reflecting. I’m attaching the sample project file, as well as 2 screenshots, with different settings for the Compositing tag of the floor.
Can someone please help? I want to achieve what I’ve previously designed in Cinema 4D, an infinite background (reflected on the objects properly) and an HDRI reflection also.
P.S. I also followed this tutorial, but I don’t the same results from the video, so obviously something changed.
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3 Replies
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I must admit I’m not 100% sure on what you’re asking – as I understand it, you want the background to be seen in the reflections, but it’s not – and you don’t want the floor to be seen in reflections but it is?
I’ve opened up the project and it renders as I would expect tbh. I may be wrong but I had thought that compositing backgrounds don’t show in reflection because they don’t have an actual 3D position – they are floating without a reference point because they always remain at the back of the scene relative to the camera. It is as the name says, just for compositing.
The floor is reflected in the sphere like it should – this is an actual object that is located in 3D space, so it can be referenced by all object by default are shown in reflections and in the view. And in the blank space not covered by the floor and background, you can see reflections of the HDRI.
Please see screenshots, first one is default render which seems correct to the scene.
If you don’t want to see the reflection of the floor, you need to select the compositing tag on the floor and uncheck “Seen by reflection” – please see second screenshot.
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If you want to use a background that is visible in reflections, you’re best off using a plane and adding the material to it, this will be located in 3D space and will be treated like a normal object.
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Hi,
I think the problem is in the reflection properties of the material because the standard properties in the material editor channels have changed in recent versions. I added the Fresnel effect to the Reflectance channel and got an appearance close to the result in the tutorial.
I hope this helps you.
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