Union failed - Selection contains CSG-incompatible instances. Error creating union with decals or textures

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#1

I’m trying to create a union of 2 parts.

Part 1 is a cylinder which I’ve already ‘unioned’ with a negative part so it has a hole in the middle

Part 2 is also a cylinder and that has a decal on it.

I’m now trying to union these 2 (cylinder) parts together (one smaller than the other) if I don’t include the decal they union fine, but I really want the decal.

When I include the decal I get the error message:

“Union failed - Selection contains CSG-incompatible instances”

I’ve tried changing the decal for a texture but still get the same error, I’ve tried png and jpg and tried adding transparency to the image, but still get the same error. I can’t find anywhere online that decals/textures are not supported in unions so I’m a bit stumped here, any suggestions greatly received please…

Thanks for reading…

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#2

As far as I’m aware, only Roblox Studio parts are CSG Compatible. I’ve had this issue before, in which I just took out the decal, unioned the parts, and then put the decal back into the union. Of course, you may want to have the decal in a certain place on the union, which is a lot different.

If you have any images that would be great

#3

Ah ok, all the parts are Roblox Studio parts. Yeah I really need the decal at a specific place here’s the parts before the union:

image

#4

If I add the decal after a union it looks like this image

#5

Yeah, because the decal is on one specific part, I don’t think it will look the same if you were to union the parts then put the decal on to it. Sadly, I don’t think there’s any way to union them and to keep it looking like the picture.

You could possibly export the union as a mesh and then put the decal/texture on to it, but I can’t help you there as I know nothing about that.

Good luck though :upside_down_face:

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#6

Ok cool as long as I’m not missing something stupid and obvious :slight_smile: just seemed like that should work to me…

Thanks for your time… maybe I’ll just have a go at a texture for the whole thing… :frowning:

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#7

May I ask why you are not just welding the parts?

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#8

To be honest I didn’t know that was an option. I’ll have a look into that thanks :slight_smile: I do intend to have a lot of these moving around so as long as welds don’t cause a degrade performance maybe that will be easier for me… thanks alot :slight_smile:

EDIT: Just added a weld, and that’s perfect! thank you @LuaBearyGood :slight_smile: