Changing opacity of transparent material forces shader recompilation about engine HOT 6 OPEN

Yep fully agreed, we discussed this and few similar material parameters before. Same for tinting parameters, and likely some others.

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Is this on the agenda for some of the next releases? This is bugging us for quite a while.

Or maybe you are open for a PR for this. I had quick look in the standard-material-options-builder.js and it should be a pretty straight forward change. But I'm still not too knowledgeable on the rendering part of the engine.
I also get it if you want a complete PR which includes all the changes on this topic, instead of only opacity and emissive tint.

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Is this on the agenda for some of the next releases? This is bugging us for quite a while.

Or maybe you are open for a PR for this. I had quick look in the standard-material-options-builder.js and it should be a pretty straight forward change. But I'm still not too knowledgeable on the rendering part of the engine. I also get it if you want a complete PR which includes all the changes on this topic, instead of only opacity and emissive tint.

As a temporary workaround you can use: material.setProperty('material_opacity', opacity) material.setParameter('material_opacity', opacity), which avoids shader recompilation.

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setProperty does not seem to be a function of material.
There is setParameter, but it doesn't prevent shader recompilation.
The only workaround I found so far is to set max opacity to 0.999 to prevent shader compilation.

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@lucaheft PRs are always welcome! 🙏

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setProperty does not seem to be a function of material. There is setParameter, but it doesn't prevent shader recompilation. The only workaround I found so far is to set max opacity to 0.999 to prevent shader compilation.

setParameter - yes, you are right.
But it does not trigger re-compilation. It does not mark the material to recompile shader (dirty flag on material). It is the most efficient way to set uniform. You can also do it for mesh instance btw.

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