3D planetary atmosphere for a Fusion newby...

Hi.

I have been working through Fusion tutorials and training materials. I have done the 3D earth/moon news graphic thing and fiddling, decided to try and put some atmosphere around the planet...I have got opacity but to get a blur edge is eluding me. Where do I find training for blurry edge spheres?

cheers

Try using falloff like so (Adjust falloff parameter to suit):

Code: Select all

{
   Tools = ordered() {
      Shape3D1 = Shape3D {
         Inputs = {
            Shape = Input { Value = FuID { "SurfaceSphereInputs" }, },
            MaterialInput = Input {
               SourceOp = "Falloff1",
               Source = "MaterialOutput",
            },
            ["MtlStdInputs.MaterialID"] = Input { Value = 1, },
            ["SurfacePlaneInputs.ObjectID.ObjectID"] = Input { Value = 1, },
            ["SurfaceSphereInputs.ObjectID.ObjectID"] = Input { Value = 2, }
         },
         ViewInfo = OperatorInfo { Pos = { 385, 214.5 } },
      },
      Falloff1 = FalloffOperator {
         CtrlWZoom = false,
         Inputs = {
            ["FaceOn.Opacity"] = Input { Value = 1, },
            ["Glancing.Opacity"] = Input { Value = 0, },
            MaterialID = Input { Value = 2, },
         },
         ViewInfo = OperatorInfo { Pos = { 385, 148.5 } },
      }
   }
}

Thank you!

I tried the Falloff node and it does a great job of softening within the sphere. I am trying to soften where the edge of the atmosphere interacts with space - the outer edge. Maybe I missed something in Falloff?

cheers

Not sure if this what you mean?

Code: Select all

{
   Tools = ordered() {
      Shape3D1 = Shape3D {
         CtrlWZoom = false,
         Inputs = {
            Shape = Input { Value = FuID { "SurfaceSphereInputs" }, },
            ["MtlStdInputs.Diffuse.Color.Red"] = Input { Value = 0.244, },
            ["MtlStdInputs.Diffuse.Color.Green"] = Input { Value = 0.244, },
            ["MtlStdInputs.Diffuse.Color.Blue"] = Input { Value = 0.244, },
            ["MtlStdInputs.MaterialID"] = Input { Value = 1, },
            ["SurfacePlaneInputs.ObjectID.ObjectID"] = Input { Value = 1, },
            ["SurfaceSphereInputs.SubdivisionLevelBase"] = Input { Value = 40, },
            ["SurfaceSphereInputs.SubdivisionLevelHeight"] = Input { Value = 40, },
            ["SurfaceSphereInputs.ObjectID.ObjectID"] = Input { Value = 2, }
         },
         ViewInfo = OperatorInfo { Pos = { 440, 214.5 } },
      },
      Shape3D1_1 = Shape3D {
         Inputs = {
            ["SurfacePlaneInputs.ObjectID.ObjectID"] = Input { Value = 1, },
            Shape = Input { Value = FuID { "SurfaceSphereInputs" }, },
            MaterialInput = Input {
               SourceOp = "Falloff1",
               Source = "MaterialOutput",
            },
            ["MtlStdInputs.MaterialID"] = Input { Value = 1, },
            ["SurfaceSphereInputs.Radius"] = Input { Value = 1.2, },
            ["SurfaceSphereInputs.SubdivisionLevelBase"] = Input { Value = 40, },
            ["SurfaceSphereInputs.SubdivisionLevelHeight"] = Input { Value = 40, },
            ["SurfaceSphereInputs.ObjectID.ObjectID"] = Input { Value = 2, }
         },
         ViewInfo = OperatorInfo { Pos = { 605, 214.5 } },
      },
      Falloff1 = FalloffOperator {
         Inputs = {
            ["FaceOn.Opacity"] = Input { Value = 1, },
            ["Glancing.Opacity"] = Input { Value = 0, },
            Falloff = Input { Value = 1.89, },
            MaterialID = Input { Value = 2, },
         },
         ViewInfo = OperatorInfo { Pos = { 605, 148.5 } },
      },
      Merge3D1 = Merge3D {
         Inputs = {
            SceneInput1 = Input {
               SourceOp = "Shape3D1_1",
               Source = "Output",
            },
            SceneInput2 = Input {
               SourceOp = "Shape3D1",
               Source = "Output",
            },
         },
         ViewInfo = OperatorInfo { Pos = { 550, 346.5 } },
      }
   }
}

Yes!

Thank you for shining a little light on my fumbling in the dark.
I dont know why I didnt get it the first time - I think it was sphere diameter.

step by step....

This works but you may find that it becomes problematic.
The planet is solid, while just the atmosphere has the falloff. so getting that balance might prove difficult with just a falloff, since you may find joining this with the planet bitf of your comp are going to cause some difficulty.
You may want to consider outputting your planet render and merging that with your atmosphere separately- with a simple 2D mask solution for the atmosphere.

You could also add a FastNoiseTexture after the Falloff with a low seethe rate and bump up the detail.