replace geo at rendertime

[hatrick]

hi,

lot's of questions at the moment ... sry for that but i stuck with some issues.... it is possible to calculate let's say a dop simulation with dummygeometry and replace the geo with hightresgeo at rendertime... instead of setting the simulated geo to boundingbox ore something like that ...

thank you

[old school]

When you add an RBD object to the DOP simulation using the shelf tools, you will find that inside the SOPs of your RBD object that there is a DOP Import SOP wired at the end. By default the DOP Import SOP is just fetching the translation, rotation and pivot channels from the simulation for the objects.

You can do a Reference Copy of that DOP Import SOP and wire in your high res geometry to the copied DOP and find that it will be translated as well.

In case you don't know, you can separate the Display and Render Flags by Ctrl-clicking on the display flag of the reference copied DOP Import SOP to move just the render flag to that SOP.

Now you have display on the low res DOP Import SOP and the render flag on the high res DOP Import SOP.

If the geometry is super-heavy, you could use point instancing from an object or try the Mantra Delayed Load Render procedural.

See the attached file for a working example.

low_high_geo_substitution_001.hip

[hatrick]

great again !!

thx

When you add an RBD object to the DOP simulation using the shelf tools, you will find that inside the SOPs of your RBD object that there is a DOP Import SOP wired at the end. By default the DOP Import SOP is just fetching the translation, rotation and pivot channels from the simulation for the objects.

You can do a Reference Copy of that DOP Import SOP and wire in your high res geometry to the copied DOP and find that it will be translated as well.

In case you don't know, you can separate the Display and Render Flags by Ctrl-clicking on the display flag of the reference copied DOP Import SOP to move just the render flag to that SOP.

Now you have display on the low res DOP Import SOP and the render flag on the high res DOP Import SOP.

If the geometry is super-heavy, you could use point instancing from an object or try the Mantra Delayed Load Render procedural.

See the attached file for a working example.

low_high_geo_substitution_001.hip

[hatrick]

am i right that the method you ve descrined (refernce copy of dop import) is not only for display purposes as also for faster simulation ??

the "import2" doesnt go through my autodoptree ?... just for getting shure

thx a lot

great again !!

thx

[old school]

The sim is referencing the "input" node of the first DOP Import SOP. That's it as far as the dependency in the simulation goes.

That's fine as you want the simulation to pick up the low res geometry.

The second reference copied DOP Import SOP simply adds channel references to the target DOP Import SOP which is simply referencing the Simulation results.

The only slowdowns with the high geometry SOP tree is the time it takes to deform that geometry in the internals of the DOP Import SOP.

[hatrick]

thx!!

The sim is referencing the "input" node of the first DOP Import SOP. That's it as far as the dependency in the simulation goes.

That's fine as you want the simulation to pick up the low res geometry.

The second reference copied DOP Import SOP simply adds channel references to the target DOP Import SOP which is simply referencing the Simulation results.

The only slowdowns with the high geometry SOP tree is the time it takes to deform that geometry in the internals of the DOP Import SOP.