Adaptive Subdivision

Note

Implementation not finished yet, marked as an Experimental Feature Set

When using the Experimental Feature Set the Subdivision Surface Modifier gets changed to control the subdivision of a mesh at the time of rendering. For this, all the other settings are the same except the View and Render settings. These previously mentioned settings get removed/renamed and the following settings are added:

../../../../_images/cycles_materials_displacement_mod.png

Subdivision Surface Modifier.

Preview

Levels
The levels of subdivision to see in the 3D View, this works the same as the View setting on the original Subdivision Modifier.

Render

Adaptive

Use OpenSubdiv to give different subdivision levels to near and far objects automatically. This allows nearer object to get more subdivisions and far objects to get less.

Dicing Rate

When using Adaptive the Render Levels property gets changed to Dicing Rate, this property is used to multiply the scene dicing rate.

../../../../_images/cycles-displacement-dicing.png

Subdivision Off/On, Dicing Rate: 1.0 - 0.3 - 0.05 (Monkeys look identical in viewport, no modifiers).

Levels
The levels of subdivision to see in the final render, this works the same as the Render setting on the original Subdivision Modifier.

Known limitations

  • Missing support for UV subdivision.
  • Creases do not match Blender creases currently.
  • Instanced are currently uninstanced, leading to increased memory usage. For those it is better to use non-adaptive subdivision still.
  • Multi-view renders can have some inconsistencies between views.
  • Editing displacement shaders while using True Displacement does not update the viewport.