| Before After Image Slider |
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| method | overlay |
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| width | 350px |
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| overlayedSlider | true |
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| leftImage | image_galleries_uuid_ |
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denoiseBefore382108068fe14a0bb56263059edfeb15| 7729d11f29b8 | | rightImage | image_galleries_uuid_denoiseafter.png- |
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|
2736dd5547d64175bd1d734f72afb944
96 samples per pixel, before and after denoising
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Users must run a disk render in order to denoise an image. Denoising is not currently supported in interactive rendering. Note that we can also run the denoise utility for AOVs; see Layered Filtering below for more information.
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Required Channels
Setting up a scene in RIB for denoising is more involved if you are doing it manually, but most of the work is in adding the correct DisplayChannel lines to the prologue. Here is the basic snippet that you will need:
| Code Block |
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# Beauty...
DisplayChannel "color Ci"
DisplayChannel "float a"
DisplayChannel "color mse" "string source" "color Ci" "string statistics" "mse"
# Shading...
DisplayChannel "color albedo" "string source" "color lpe:nothruput;noinfinitecheck;noclamp;unoccluded;overwrite;C(U2L)|O"
DisplayChannel "color albedo_var" "string source" "color lpe:nothruput;noinfinitecheck;noclamp;unoccluded;overwrite;C<.S'passthru'>*((U2L)|O)" "string statistics" "variance"
DisplayChannel "color diffuse" "string source" "color lpe:C(D[DS]*[LO])|O"
DisplayChannel "color diffuse_mse" "string source" "color lpe:C(D[DS]*[LO])|O" "string statistics" "mse"
DisplayChannel "color specular" "string source" "color lpe:CS[DS]*[LO]"
DisplayChannel "color specular_mse" "string source" "color lpe:CS[DS]*[LO]" "string statistics" "mse"
# Geometry...
DisplayChannel "float z" "string source" "float z" "string filter" "gaussian"
DisplayChannel "float z_var" "string source" "float z" "string filter" "gaussian" "string statistics" "variance"
DisplayChannel "normal normal" "string source" "normal Nn"
DisplayChannel "normal normal_var" "string source" "normal Nn" "string statistics" "variance"
DisplayChannel "vector forward" "string source" "vector motionFore"
DisplayChannel "vector backward" "string source" "vector motionBack"
Display "image.exr" "openexr" "Ci,a,mse,albedo,albedo_var,diffuse,diffuse_mse,specular,specular_mse,z,z_var,normal,normal_var,forward,backward" "int asrgba" 1
Hider "raytrace" "string pixelfiltermode" "importance" # ... |
| Note |
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We mention use of "normal Nn", however for hair we recommend substituting Tn "Hair Tangent" for the best results of Denoising hair. |
In the above example we include "vector forward" and "vector backward" for completeness. These are only used (one or the other or both) for cross-frame denoising but not for a single frame. If only one exists, the Denoiser assumes the opposite vector for the missing direction. If neither exists, it will still operate but in a limited capacity.
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By default, it will write out <image>_filtered.#.exr. This can be changed by specifying -o. See denoise -help for more information on other denoise command options. Note that we can also run the denoise utility for AOVs with crossframe; see Layered Filtering below.
From RIB
If rendering straight from RIB, configure each frame the same as you would for basic rendering as above. For best results you will want to make sure that the motion vectors, forward and backward, are included this time. Then run the denoise utility with:
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| Code Block |
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'$RMANTREE/bin/denoise --crossframe '
+' image_variance.'+str(int(frame)-1)+'.exr'
+' image_variance.'+str(int(frame))+'.exr'
+' image_variance.'+str(int(frame)+1)+'.exr'
+' diffuse_key.'+str(int(frame)-1)+'.exr'
+' diffuse_key.'+str(int(frame))+'.exr'
+' diffuse_key.'+str(int(frame)+1)+'.exr' |
From RIB
Single Frame
| Code Block |
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denoise master_variance.exr light0_dir.exr light1_indi.exr
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