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Volumetric Fog feedback thread

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    There seems to be a bug when using world position in a light function in combination with volumetric fog. Notice in the attached images the incorrect masking of the volumetrics. The expected result would be that only the volumetrics below the cube surface are darkened similar to the sides of the cube. The issue is also camera relative, so this masking flies around the scene depending on the camera angle making this combination of features unusable.

    To make matters worse there doesn't seem to be a way of disabling the light function just for the volume fog effect. In my usecase (and I imagine for others as well) I wouldn't need that anyway so it seem like a useful optimization to offer that option.

    Edit: I submitted a bug report with an example project here on answerhub.
    Attached Files
    Last edited by Arnage; 08-15-2019, 06:44 AM.


      I didnĀ“t find any discussion about theatrical lighting, sorry if there is some.

      But my question is:
      Is there anyway to make volumetric lights with gobos like in this picture?
      I already try in lightfunction material and it works in objects and surface. but not in the air.

      Click image for larger version

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        I just start on ue4 and I'm working on my first project, so i want to apply a local volumetric fog, and I already follow the instructions to do it with the ue4.21 version and it worked very well, so now I wanna do this again in the ue4.23 and it doesn't, I don't understand why.

        I made the material, I customize it a little, after that I run it through a particle, set the light and the exponentiel fog and it worked. I do all this once again, I read all the volumetric fog ue4 docs, and idon't what I forget.

        So, it will be welcome if someone can help me to solve this problem.

        My computer run with
        -i7 4770
        -nvidia GeForce GTX 1060 OC

        Thanks for your help!