LuxCoreRender Forums

I think because by default camera assumes air to be ext interior and you view into the fog, not inside it. I might be wrong tough.

Did you also define ext volume for your room object?

Background should be black, yes. If I only use pure rgb colors in MATERIAL_ID_MASK AOV I get clean masks. White is problem because that contains all full rgb values, black doesn't and won't mess up the masks

Not object mask. I'm strictly using only material color id masks, because I can use this to create perfect rgb masks. Other ID masks use some weird hacks in Blender to create anti aliasing and what else. Altough cryptomatte integration could solve all these problems *wink *wink :D Could even create ...

Probably interior and exterior volume are not defined for objects. Attached fixed blend conf

Is it possible to exclude world from material id color aov? I cannot use alpha to cut it out because this is antialiased and white world color bleeds into other id's

So if I was rendering a sea I could also benefit from transparent shadows?

Now all that is left to do is render this on a proper sea simulation. These are just for presenting asset

A quick composite with my buoy asset. I think it turned out quite nicely

I see, so some kind of 3d data is only way to go with this kind of thing.