Changes At Rendertime

[HyFrmn]

I'm new to scripting with houdini. I have a scene setup with a switch, with geometry that needs to cook going into input 0, and a file node going into input 1. My goal was to write a script, that would automatically change the input on the switch to 0, before renders, and back to 1 after renders. I've been using opparm to do this with success when I type the commands directly in to the textport, but when I put them in a file, and point the pre/post render script to them, nothing happens. Any ideas??

Thanks

[michael]

From the Help:

Pre & Post Frame Render Scripts

Many output OPs have a pre-render, pre-frame, post-frame and post-render script available, they function as follows:

o The pre-render script is run one time before any rendering starts.

o The pre-frame script is run before each frame is rendered.

o The post-frame script is run after each frame is rendered.

o The post-render script is run one time after the entire render is completed.

so what you're looking for is a pre-frame render script

[Jason]

Look into Takes for this too. They are designed to do this very thing.

(If they confuse you, write back.)

[sibarrick]

This is probably a really dumb question, but why not just set the render flag to the scene and the display flag to the file sop?

[HyFrmn]

thanks for all the replies but I quickly found my problems. I thought the pre/post render scripts, were the path to a script file, and not actually script. so I actually had to source the scripts myself. Also I found that the takes are a much quicker solution. Thanks for the help.