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Paavo avatar image
Paavo asked SFSimsDev answered

Invisible materials causing packagetool warnings

I am using Blender and I created a mesh collider for an object as instructed by the SDK, set its material to type Invisible and checked Collision Material. Then I exported the object and launched fspackagetool.exe to compile it.

Package tool reported a warning about alpha value:

Invisible material 'collider' has an alpha value below 0.1; this will make it hard to see when debugging. Since it is invisible under normal circumstances, consider putting a higher alpha value.

I did not change alpha value nor is it even settable with this material type (settings grayed out).

Either the Blender exporter sets wrong alpha value or fspackagetool reports unnecessary warnings. When debugging, the collision mesh is visible and covered with chessboard pattern.

Version information:
Microsoft Flight Simulator 1.25.9.0 (Steam version)
Official MSFS Blender IO 1.1.6

packagetool
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2 Answers

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ModelMuncher avatar image
ModelMuncher answered

The same occurs with 3DSMax 2018 and Latest SDK
The alpha in this example has been set in 3DS Material editor as 1.00

Invisible material 'Occlusion' has an alpha value below 0.1; this will make it hard to see when debugging. Since it is invisible under normal circumstances, consider putting a higher alpha value.

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SFSimsDev avatar image
SFSimsDev answered

I think it's a fair warning (at least it's not an error) as it's trying to help you with future in-sim debugging if you're expecting to see something with an alpha below 0.1. However the debugger could probably be more helpful by not issuing a warning /false positive where "ASOBO_material_invisible" : "enabled" = true in the GLTF if that's what you mean? Specifically


               "ASOBO_material_invisible" : {
                    "enabled" : true
                }
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