Disable unsupported SSR, SSS, DoF on transparent viewports #108206
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For technical reasons, transparent viewports cannot support screen-space reflections, subsurface scattering and depth of field. Previously, enabling any of these would turn transparent viewports invisible.
Calinou
added
bug
topic:rendering
documentation
topic:3d
cherrypick:4.4
Calinou
commented
Jul 2, 2025
| WARN_PRINT_ONCE("Sub-surface scattering is not supported in viewports with a transparent background. Disabling SSS in transparent viewport."); | ||
| using_sss = false; | ||
| } | ||
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| if ((using_sss || ce_needs_separate_specular) && !using_separate_specular) { |
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This check makes me curious: are all compositor effects that need separate specular broken when using a transparent background? If so, we should add a dedicated warning here when such an effect is used.
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For technical reasons, transparent viewports cannot support screen-space reflections, subsurface scattering and depth of field. Previously, enabling any of these would turn transparent viewports invisible.
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