Lost negative value of directional lightmap

[lvjiahui]

Hi, When using RTLightmap filter, It is said in the document that the input directional values are in [-1, 1]. But I find all negative value is clamped to 0 in the output. If I map the input value to [0, 1], and map the output back to [-1,1], it seems to work correctly. So I'm wondering if I'm doing something wrong or the documentation has a mistake? Thanks!

[atafra]

Did you set the directional filter parameter to true? The input is expected to be in [-1, 1] only if this is set, as described in the documentation.

[lvjiahui]

It turns out that my input data is slightly out of [-1,1] range. After I clamp the input data everything is ok!