The rendered image is missing some render elements, denoising/adaptivity might not work properly
This message appears in the following cases:
1. When using the "Resume from file..." option and the currently loaded Corona EXR file lacks some information required for the image to be properly rendered with adaptivity and denoising.
This happens if the Corona EXR was originally rendered without denoising and/or adaptivity enabled, and currently at least one of these options is enabled. As a result, the image may come out wrong, as it will be processed only based on the newly-rendered passes.
Example: The Corona EXR was saved after 100 passes (without adaptivity and/or denoising), and 20 passes were rendered afterwards (with adaptivity and denoising enabled). In this case, denoising will be computed based on those 20 passes only, even though the frame buffer will display a total of 120 passes. This can make the overall image quality much worse than expected.
Solution: This behavior cannot be "fixed" as the EXR file lacks the essential information. The suggested solution is to either:
- Discard the EXR and start rendering from scratch with adaptivity and denoising enabled
or - Ignore the error message - denoising might still work if enough passes are rendered
2. When using the "Resume last render" option and the original content of the VFB lacks some information required for the image to be properly rendered with adaptivity and denoising.
This happens if the current content of the VFB was rendered without denoising and/or adaptivity enabled, and one of these options was enabled after stopping the rendering. As a result, the image may come out wrong, as it will be processed only based on the newly-rendered passes.
Example: The image was rendered for 100 passes (without adaptivity and/or denoising), and 20 passes were rendered afterwards using the "Resume last render" button (with adaptivity and denoising enabled). In this case, the denoising will be computed based on those 20 passes only, even though the frame buffer will display a total of 120 passes. This can make the overall image quality much worse than expected.
Solution: this behavior cannot be "fixed" as the content of the VFB file lacks the essential information. The suggested solution is to either:
- Discard the current rendering and start rendering anew with adaptivity and denoising enabled
or - Ignore the error message - denoising might still work if enough passes are rendered