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Potential Bug - Adding models to a custom model in game


Hello GMC!
GM Version: 1.4.1763

I think I have discovered a bug but before I report it, I want to confirm with someone here in case if it's something I've done wrong.

The Bug:
Whenever I try to add a block (using d3d_model) to a custom model that's from a separate instance, the custom model doesn't appear to draw the new modification. I want to use this method because it's more efficient to have 1 draw call instead of 50.

I've provided an example project of this issue.
https://www.dropbox.com/s/06p0hb2liocyp7z/Bug Test.gmz?dl=0


Edit: Realised I should contact helpdesk instead...
Last edited: