I am using v ray 3.6 for rendering and I am just using the default environment settings but after rendering there this greyish thing in background which I want to get rid of..
What is this and how to get rid of it.
How to get rid of this grey thing that shows up in eviroment.
Accepted solution
What you are seeing is a simulated ground place. The VraySky map creates a blue gradient in the sky to add environmental light. It also adds in the grey 'ground' to help simulate light bouncing up from the ground.
If you save it as an image type with Alpha channel (PNG, TIF, TGA) you can easily use Photoshop or something to add in your own outdoor scene. You could also replace the VraySky map with an HDRI of an exterior scene. Or just build some stuff out there to cover up the grey. Add some grass, shrubs, whatever.
Chris Medeck
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So I tried to use this map by going to exposure control>enviroment>bitmap and selecting the map but the render end up very dark.
The VraySky map was creating ambient light in your scene, but that was lost when you replaced the map. But, there is a simple workaround!
Go to the V-Ray tab in the Render Setup dialog box. Near the bottom is a rollout called Environment. The options in here are overrides to the general settings. What you'll want to do is check the box next to GI environment and add the VraySky map into the map slot. This will use that map for your GI calculations but still show your other image as the background in your render.
You'll also see that there are other options in there, one of which I use quite often: Reflection/refraction environment. This one is great if you want to see clouds reflected in glass or water without using an HDRI image in your lighting calculations.
Chris Medeck
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One thing I should mention about using other maps in the background of your render. You will likely need to adjust the output of the map to compensate for the exposure control. I recommend using an HDRI image, but just a standard bitmap type can also work.
If using HDRI, add it with the VRayHDRI map and adjust the 'Render mult' setting until it looks right. If you only have a standard bitmap, adjusting the Output Amount under the Output rollout also can work. But because it is not HDRI, you may get some blowout of brights or grey darks.
Chris Medeck
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