ember venture
Well, I think the solution is simple, but I'm too much of a beginner to know it. So, I'm creating a shader in Unity URP 2022.3.41f. But when I set the shader to transparent, my texture looks weird, as if I can see through the mesh but without transparency (see photo for details).
Thanks in advance for any answers.
barren notch
Well, I think the solution is simple, but I'm too much of a beginner to know it....
The alpha isn't wrong exactly, but the render order of polygons is
That always happens with transparent geometry and there is no simple or convenient fix, so you'd prefer to use alpha transparency as sparingly as possible
ember venture
@barren notch So if I understand correctly, this would come from a problem with how Unity URP manages the alpha?
thx you for your response
barren notch
<@166982635950702592> So if I understand correctly, this would come from a probl...
Yes, or how pretty much every raster renderer regardless of engine handles alpha
There's three paths that I know of to mitigate it
First is to minimize the use of alpha, so only use it for something that must be semi-translucent and is simple geometry where sorting problems are not likely to occur, like particles
Second is to utilize workarounds like empty pass to only render the closest transparent surface, or maybe do some kind of manual polygon sorting, but those have caveats
Third is to implement Order Independent Transparency which isn't typically cheap, and how robust it is depends on the implementation
HDRP does have some kind of OIT of its own, I believe