The reason the coordinates are from -1 to 1 by default is because those are the easiest/quickest coordinates to access, anything else is extra math. I want SF to be optimized, while still giving you lots of control.
The distortion you're getting is because the screen coordinates are per-vertex at the moment, which is a known issue. There will be a setting to use either vertex or pixel coords. A workaround at the moment would be to use a more tessellated plane, either with a more detailed model, or using DX11 tessellation.
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Is there a work around ?
I managed to get the screen space between 0 -1, however, I get this distortion, if my camera isn't look straight to the plane.
The reason the coordinates are from -1 to 1 by default is because those are the easiest/quickest coordinates to access, anything else is extra math. I want SF to be optimized, while still giving you lots of control.
The distortion you're getting is because the screen coordinates are per-vertex at the moment, which is a known issue. There will be a setting to use either vertex or pixel coords. A workaround at the moment would be to use a more tessellated plane, either with a more detailed model, or using DX11 tessellation.