TCL
Write nodes filename from topmost read
if you need your output file named exactly like your input file then use a little TCL expression in the file knob of the write node suggestion your filename convention is like: //path/to/file/filename.pattern.ext then: [lindex [split [lindex [split [knob [topnode].file] .] 0] /] end] will give you back just the "filename" part of the original read node if you want…
Value vs Knob command
The simplicity of tcl's command based nature makes it nice and easy to use in Nuke's text knobs, such as labels (you can actually use tcl that way in pretty much any knob in Nuke that can take an expression). The value and knob commands in particular are very handy to show node properties in the DAG.…