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Fixes #6 (Warn: R_RemapShader: new shader textures/thunder/blend not found). The visible consequence of this bug was that one of the lighting bolts is displayed at the beginning of the map. Beyond that, the mistake didn't have further consequences because it was canceled out by an engine bug. When the replacement shader is not found, R_RemapShader uses a "defaulted" shader, which are never supposed to be used for rendering, as the replacement. The defaulted shader has 0 stages so it renders nothing, which happens to be what textures/thunder/blend is supposed to do.
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Make R_RemapShader handle shader registration flags correctly. For each version of the shader, register the replacement shader with a matching set of flags, instead of always using RSF_DEFAULT. Also this fixes a bug that when the replacement shader was not found, the 'defaulted' shader (one that was not found or failed parsing) for rendering. New behavior is to not change the replacement state. Note that Thunder has recently been relying on this bug - see UnvanquishedAssets/map-thunder_src.dpkdir#7
slipher
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Aug 23, 2025
Make R_RemapShader handle shader registration flags correctly. For each version of the shader, register the replacement shader with a matching set of flags, instead of always using RSF_DEFAULT. Also this fixes a bug that when the replacement shader was not found, the 'defaulted' shader (one that was not found or failed parsing) for rendering. New behavior is to not change the replacement state. Note that Thunder has recently been relying on this bug - see UnvanquishedAssets/map-thunder_src.dpkdir#7
slipher
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Aug 27, 2025
Make R_RemapShader handle shader registration flags correctly. For each version of the shader, register the replacement shader with a matching set of flags, instead of always using RSF_DEFAULT. Also this fixes a bug that when the replacement shader was not found, the 'defaulted' shader (one that was not found or failed parsing) for rendering. New behavior is to not change the replacement state. Note that Thunder has recently been relying on this bug - see UnvanquishedAssets/map-thunder_src.dpkdir#7
slipher
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Sep 25, 2025
Make R_RemapShader handle shader registration flags correctly. For each version of the shader, register the replacement shader with a matching set of flags, instead of always using RSF_DEFAULT. Also this fixes a bug that when the replacement shader was not found, the 'defaulted' shader (one that was not found or failed parsing) was used for rendering. New behavior is to not change the replacement state. Note that Thunder has recently been relying on this bug - see UnvanquishedAssets/map-thunder_src.dpkdir#7
slipher
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Sep 25, 2025
Make R_RemapShader handle shader registration flags correctly. For each version of the shader, register the replacement shader with a matching set of flags, instead of always using RSF_DEFAULT. Also this fixes a bug that when the replacement shader was not found, the 'defaulted' shader (one that was not found or failed parsing) was used for rendering. New behavior is to not change the replacement state. Note that Thunder has recently been relying on this bug - see UnvanquishedAssets/map-thunder_src.dpkdir#7
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Fixes #6 (Warn: R_RemapShader: new shader textures/thunder/blend not found). The visible consequence of this bug was that one of the lighting bolts is displayed at the beginning of the map.
Beyond that, the mistake didn't have further consequences because it was canceled out by an engine bug. When the replacement shader is not found, and it has already been searched previously, R_RemapShader uses a "defaulted" shader, which are never supposed to be used for rendering, as the replacement. The defaulted shader has 0 stages so it renders nothing, which happens to be what textures/thunder/blend is supposed to do.