Cone mesh that gradually fades?

Questions & Answers
1

Edit 1:

85075-coneexample.png
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Here is a picture of how far I have got. I have mapped a white to transparent radial gradient onto the cone but there is a very visible seam. Luckily if viewed from one side the seam isn’t visible so it shouldn’t be too much of a problem.

I want to make a cone mesh fade out on a gradient where at the top of the cone (the single vertex) it is white and at the bottom (the face) it has completely faded out, like a “lighthouse effect”. I have done some research and I think it is referred to as “volumetric lighting” but I don’t have the money to spend on asset packs under this name.

I have:

  • A cone mesh.
  • A gradient texture (white on the bottom, black on the top).
  • Another gradient texture (white on the bottom, transparent on the top).

I have tried many things that haven’t worked and I would appreciate it if anyone can shed some light (pun intended) on the matter.

Thanks.

2

It seems that the uv coordinates don’t match the image.

I can see the image, but not the actual unwrapped “uv layout”. Double check that that layout conforms to the correct area of the image. You should also “dilate” the sampled image, to avoid seams when looking from larger distances (if mip-maping is used)

3

Create a new material and reduce periodically the Alpha value with a script.