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[TUTORIAL] Object Angle Based Fade
Hey guys, I just wrote a quick guide about how to fade a object base on its angle, using Ue4, its useful for faking light shafts, glow and stuff using planes without making so obvious that its just a plane. You can find the more details and a bit of explanation on the workflow on my website:… -
Re: [TUTORIAL] Object Angle Based Fade
yeah, Mark's solution does seems to be giving me some type of fresnel, maybe I am missing something? and thank for sharing that information @Bruno Afonseca I did not know you could use a 3vector like that (makes a lot of sense now that I think about it). It works great from fading the object from the top and it saves about… -
Re: [TUTORIAL] Object Angle Based Fade
That's more of a fresnel opacity kind of thing, right? You can combine both for making more complex stuff :) Regardless I thing the dot product is the way to go: 0,0,-1 in camera space means pointing towards the camera and the ObjectOrientation points to the object's z+ axis. If you get the dot product of both, you'll get… -
Re: [TUTORIAL] Object Angle Based Fade
@rohMizuno Well, Vector is just an array of floats, [0,0,1] is a CameraVector, so [0,0,-1] is the opposite one. And yes, @marks solution would produce a fresnel (inverted), it also won't work for camera oriented sprites (their normal always aligned to the camera). Shortest version of what your second example was in the… -
Re: [TUTORIAL] Object Angle Based Fade
I remember seeing a version of this effect in Half Life 2, it was a spotlight that transitioned between a beam and a flare depending on how it faced the camera. It's the lighthouse effect: https://www.youtube.com/watch?v=pZyo97Z73oM -
Re: [TUTORIAL] Object Angle Based Fade
very nice, brings back the feels from UE3 pick ups -
Re: [TUTORIAL] Object Angle Based Fade
This will come in handy, in CE3 they had a funcion like that in the vegetation shader, which faced branch planes at high angles, making it less obvious that the trees were so low poly. -
Re: [TUTORIAL] Object Angle Based Fade
I am just adding here something that F A I T H shared on twitter: "if you use dot product with exposed vector 3 parameter, you can then specify which axis to use in material instance per case: " I also updated my blog post with most of the information that you guys provided here, so thanks a lot for sharing and helping! -
Re: [TUTORIAL] Object Angle Based Fade
SurfaceOpacity = dot ( SurfaceNormal, CameraViewVector) Seems like it does very broadly the same thing
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