Chaos Corona for Cinema 4D > [C4D] Bug Reporting

Corona Proxy gets materials wrong

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lollolo:
I'm having an issue with Proxy.

- Create a cube
- make several poly selections
- apply a material to every selection
- create a Proxy - until now everything is working
- create another material and apply it to one of the selections you created before (so a selection is used twice)
- create a proxy - materials are not correctly applied.

In my example here, only one material channel was created, but there should be 6.

Win 10
C4D R20 + 12 hotfix 2

Can you reproduce it? Thanks for checking.

lollolo:
Were you able to reproduce this issue?

Thanks

maru:
I can reproduce it in your scene, but not in a new scene (C4D 2025, Corona 12 U1 HF1). For some reason your cube exports as a proxy with 1 material channel. If I do it from scratch, I end up with 3 channels (when using 3 materials).

Could you explain how you are doing this from scratch, step by step? Or maybe record a short video, if I'm not asking for too much.

lollolo:
@maru thank you for your reply. I sent you a PM with a link, because Corona uploader doesn't work for me.

It does still happen to me, even when I create a new scene. I'm using R20 and Corona 12 Update Hotfix 1. Perhaps it is related to R20 only?

bnji:
Hello there @lollolo,
When manually creating a proxy, please make sure to use texture map files for the applied materials.
I can see from your scene project you're using a procedural checkerboard texture. (this is why it only creates a single material channel)
Using texture map files for the materials will create the appropriate number of material channels for the proxy. (see attached image)
Note: Also, do not forget to create the UVW coordinates for each material. (select the material tags > right-click on any of them > "Generate UVW Coordinates")
This way, you can even load the exported ".cgeo" file in 3ds Max using the Corona Proxy object. (just need to recreate the same materials)
I hope this helps.
Looking forward to hearing from you.
Kind regards.

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