Werid IBL DFG Lut result

[GerradLong]

Hi, I've captured a frame in render doc and the light_iblDFG texture looks weird:

I've checked the generated texture E:\Projects\filament\out\filament\generated\data\dfg.inc

and the header says that it was generated with cmgen --ibl-dfg=E:\Projects\filament\out\filament\generated\data\dfg.inc

so I decided to run cmgen myself cmgen --ibl-dfg=test.png and it generated the "standard" DFG texture:

CubemapIBL::DFG(...); function looks normal

DFG::getTexture() is used only in PerViewUniforms::PerViewUniforms() and I don't see any GPU processing of this texture.