Fixed a deadlock in Houdini which occured when cooking from HOM a multi-threaded network that needed access to Python. As an example, calling `hou.Node.cook()` on a multi-threaded VOP network that contained VOP nodes with Python parameter expressions.

Fixed a deadlock in Houdini which occured when cooking from HOM a multi-threaded network that needed access to Python. As an example, calling `hou.Node.cook()` on a multi-threaded VOP network that contained VOP nodes with Python parameter expressions.

Fixed a deadlock in Houdini which occured when cooking from HOM a multi-threaded network that needed access to Python. As an example, calling `hou.Node.cook()` on a multi-threaded VOP network that contained VOP nodes with Python parameter expressions.

Fixed a deadlock in Houdini which occured when cooking from HOM a multi-threaded network that needed access to Python. As an example, calling `hou.Node.cook()` on a multi-threaded VOP network that contained VOP nodes with Python parameter expressions.

Fixed deadlocks when rendering via SOHO which used multithreaded cooking (eg. VOP SOP) that evaluated Python expressions.

Fixed deadlocks when rendering via SOHO which used multithreaded cooking (eg. VOP SOP) that evaluated Python expressions.

Fixed deadlocks when rendering via SOHO which used multithreaded cooking (eg. VOP SOP) that evaluated Python expressions.

Fixed deadlocks when rendering via SOHO which used multithreaded cooking (eg. VOP SOP) that evaluated Python expressions.

Fixed deadlocks when rendering via SOHO which used multithreaded cooking (eg. VOP SOP) that evaluated Python expressions.

Fixed deadlocks that could occur when using the Wedge ROP to cook networks that contain multithreaded VOP operators that in turn trigger python evaluation.

Fixed deadlocks that could occur when using the Wedge ROP to cook networks that contain multithreaded VOP operators that in turn trigger python evaluation.

Fixed deadlocks that could occur when using the Wedge ROP to cook networks that contain multithreaded VOP operators that in turn trigger python evaluation.

Fixed deadlocks that could occur when using the Wedge ROP to cook networks that contain multithreaded VOP operators that in turn trigger python evaluation.

Fixed deadlocks that could occur when using the Wedge ROP to cook networks that contain multithreaded VOP operators that in turn trigger python evaluation.

Added note that the HOUDINI_MULTITHREADED_COOKING environment variable is an experimental feature. If enabled, cooking problems are expected such as deadlocks.

Added note that the HOUDINI_MULTITHREADED_COOKING environment variable is an experimental feature. If enabled, cooking problems are expected such as deadlocks.

Added note that the HOUDINI_MULTITHREADED_COOKING environment variable is an experimental feature. If enabled, cooking problems are expected such as deadlocks.

Added note that the HOUDINI_MULTITHREADED_COOKING environment variable is an experimental feature. If enabled, cooking problems are expected such as deadlocks.

Added note that the HOUDINI_MULTITHREADED_COOKING environment variable is an experimental feature. If enabled, cooking problems are expected such as deadlocks.

Fixed deadlocking in Houdini whenever a multi-threaded VEX node uses the op: syntax to cook another multi-threaded VEX node.

Fixed deadlocking in Houdini whenever a multi-threaded VEX node uses the op: syntax to cook another multi-threaded VEX node.

Fixed deadlocking in Houdini whenever a multi-threaded VEX node uses the op: syntax to cook another multi-threaded VEX node.

Fixed deadlocking in Houdini whenever a multi-threaded VEX node uses the op: syntax to cook another multi-threaded VEX node.

Fixed deadlocking in Houdini whenever a multi-threaded VEX node uses the op: syntax to cook another multi-threaded VEX node.

Fixed deadlocking introduced in 10.5.214 whenever multi-thread VEX (or CVEX) runs in Houdini. One notable place is in the Pyro tool.