Optimus system

If you happen to use Nvidia Optimus based hardware like myself (switching between integrated GPU and a discrete NVIDIA GPU), you may want to make sure Houdini is fully running on your GPU. Create a houdini-bin.sh wrapper and add:

 # Optimus forcing to NVIDIA
export __GLX_VENDOR_LIBRARY_NAME=nvidia;
export __NV_PRIME_RENDER_OFFLOAD=1
export __VK_LAYER_NV_optimus=NVIDIA_only
export __GL_SHOW_GRAPHICS_OSD=1

Of course, if you are using a non NVIDIA card, you need to edit it accordingly.