Environment lighting results different by cpu and opencl

[frank_yifei]

The scene is lit by sky and sun. I tried with only sky or flat colour, the difference is still there. Maybe it is a bug in opencl code.
both rendered 500 samples without any cache or other setting.
opencl

cpu

[B.Y.O.B.]

Can you upload the scene?

[frank_yifei]

home.blend

(2.73 MiB) Downloaded 204 times

it is a blender 2.8 file.

[kintuX]

You got coplanar faces which are causing an issue. The room floor and the plane (ground) are located at same height (0).
Either move one up/down or cut out a whole from the plane.

[frank_yifei]

ok, thanks, it solved my problem. I just wonder why it is not showing in cpu rendering.

[B.Y.O.B.]

For mysterious reasons, OpenCL engines in LuxCore have more problems with floating point precision than the CPU engines.