Support new Emission Strength on Principled BSDF

[emackey]

A new Emission Strength input was added to the Principled BSDF node in D4971.

Emission strength from the original Emission BSDF node was added in #1159. It should be updated to include the new strength input as well.

[emackey]

Ah, correction: #1159 already includes code to look for emission strength on Principled BSDF. We should add test(s) for this once we get a daily build with the new input added.

[julienduroure]

So, seems exporter already manage it (to be tested with tomorrow's build)
Importer still need to be updated?

[scurest]

Emission Strength is now in the latest build. I can confirm exporting works.

The importer can use the strength socket for grayscale emissiveFactors at least.

[KenzieMac130]

Hi! Author of the Emission Strength Socket patch.

https://developer.blender.org/D8777 is needed to access the socket via python using the Principled BSDF wrangler. It is in review but the API should remain the same.

You can find the WIP updated OBJ importer here which contains code to handle importing/exporting emission strength by doing a sort of RGBM encoding/decoding. https://developer.blender.org/D8868

Thanks

[julienduroure]

Hello @astrand130 , current implementation of glTF is not using node_shader_utils wrangler.

Exporting is already manage since yesterday, and importer will be via #1217

[julienduroure]

Import part is now merge. Closing