Cycles: Add option to change input passes for viewport denoising

There are cases where the default input passes of color+albedo do not yield useful results
and while this was possible to change that for final frame rendering (in the layer settings),
viewport denoising always used a fixed color+albedo. This adds an option to change the
input passes for viewport denoising too, so that one can use it in scenes that otherwise
wouldn't work well with it.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D10404

intern/cycles/blender/addon/properties.py

@@ -646,6 +646,12 @@ class CyclesRenderSettings(bpy.types.PropertyGroup):
         min=0, max=(1 << 24),
         default=1,
     )
+    preview_denoising_input_passes: EnumProperty(
+        name="Viewport Input Passes",
+        description="Passes used by the denoiser to distinguish noise from shader and geometry detail",
+        items=enum_denoising_input_passes,
+        default='RGB_ALBEDO',
+    )
 
     debug_reset_timeout: FloatProperty(
         name="Reset timeout",
@@ -1434,7 +1440,6 @@ class CyclesRenderLayerSettings(bpy.types.PropertyGroup):
         items=enum_denoising_input_passes,
         default='RGB_ALBEDO',
     )
-
     denoising_openimagedenoise_input_passes: EnumProperty(
         name="Input Passes",
         description="Passes used by the denoiser to distinguish noise from shader and geometry detail",

intern/cycles/blender/addon/ui.py

@@ -275,6 +275,8 @@ class CYCLES_RENDER_PT_sampling_denoising(CyclesButtonsPanel, Panel):
 
         sub.prop(cscene, "denoiser", text="")
 
+        layout.separator()
+
         heading = layout.column(align=False, heading="Viewport")
         row = heading.row(align=True)
         row.prop(cscene, "use_preview_denoising", text="")
@@ -285,6 +287,9 @@ class CYCLES_RENDER_PT_sampling_denoising(CyclesButtonsPanel, Panel):
         sub = heading.row(align=True)
         sub.active = cscene.use_preview_denoising
         sub.prop(cscene, "preview_denoising_start_sample", text="Start Sample")
+        sub = heading.row(align=True)
+        sub.active = cscene.use_preview_denoising
+        sub.prop(cscene, "preview_denoising_input_passes", text="Input Passes")
 
 
 class CYCLES_RENDER_PT_sampling_advanced(CyclesButtonsPanel, Panel):

intern/cycles/blender/blender_sync.cpp

@@ -1005,6 +1005,9 @@ DenoiseParams BlenderSync::get_denoise_params(BL::Scene &b_scene,
         cscene, "preview_denoiser", DENOISER_NUM, DENOISER_NONE);
     denoising.start_sample = get_int(cscene, "preview_denoising_start_sample");
 
+    denoising.input_passes = (DenoiserInput)get_enum(
+        cscene, "preview_denoising_input_passes", DENOISER_INPUT_NUM, (int)denoising.input_passes);
+
     /* Auto select fastest denoiser. */
     if (denoising.type == DENOISER_NONE) {
       if (!Device::available_devices(DEVICE_MASK_OPTIX).empty()) {