Realistic ArchViz from Cycles to Eevee (with tips)

The Chocofur interior scene 4.

This is a heavy scene having multiple rooms with trees, plants, carpet and grass. The large carpet and many trees made from hair particles added minutes of additional rendering time at 512 sampling rate. The change to PCF shadows in Blender for this scene require high sample rate to completely smooth the shadows.

Optimizing to only render the trees that are visible can reduce the rendering time dramatically. I did not do the scene changes required for this optimization.

Workflow:

  1. Adjusted power for area lights.
  2. Use an HDR world background node.
  3. IRV for the main, kitchen and hall room of 4x4x3.
  4. IRV of 2x1x1 under the sofa for better shadow definition.
  5. Rectangular reflection cube map.
  6. Most of the materials were update to use the principal shader replacing Chocofur custom glossy and metal shaders. This shaders cause Eevee artifacts.
  7. Use my realistic shader for glass items.
  8. Reduce the size of the contact shadows on the area light to closely match the cycles render.
  9. Sampling rate of sampling at 512 to smooth the leaves shadows on the floor and sofa.

This is the Cycles raw render:

The Eevee scene was adjusted to match closer to the composite version of Chocofur.

The Eevee raw render at 512 samples took 7:01 minutes:

Detail Eevee render at 512 samples facing to the outside took 6:46 minutes:

Detail Eevee render at 256 samples of the kitchen took 90 seconds:

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