been an issue for a while, when playing the last stage of kitsune2 or in the stage select region the fps goes down to less than 10 or freezes, I have tried these commands:
r_3dsky 0; mat_motion_blur_enable 0; ssao_enable 0; r_worldlights_cast_shadows 0; mom_menu_blue 0
but it still drops fps, wondering if this will be patched in the future.
#Surf_Kitsune2 fps issues
marble plaza
noble prawn
this is known, it's a map issue