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Bit guessing wihout anything to look at. Could be that material of the family is assigned "By Category". In that case when in the old project you have no object style created in the project the family will show the "Default" material which is normally grey. When you copy that object to the new project and that project has an object style set with a certain material than your object will use that material.
You can do two things, change the object style in the new project. Alterantively edit the family and assign a material to it.
Could help if you can upload your family so we can have a look what might be the cause
Louis
Please mention Revit version, especially when uploading Revit files.
Bit guessing wihout anything to look at. Could be that material of the family is assigned "By Category". In that case when in the old project you have no object style created in the project the family will show the "Default" material which is normally grey. When you copy that object to the new project and that project has an object style set with a certain material than your object will use that material.
You can do two things, change the object style in the new project. Alterantively edit the family and assign a material to it.
Could help if you can upload your family so we can have a look what might be the cause
Louis
Please mention Revit version, especially when uploading Revit files.
Visbility is little bit complicated in the beginning because there are many things that influence how object looks like
Starting in the family editor
If you check the objects you see that the batthub walls have a material assigned "Hob" This is the grey 200x200 mm tiles.
Also note that it is an instance parameter so in the project you can change the material of every instance of the bathtub
The tub itself is "By Category". This means it is determined by the object styles
You can see that the bathtub walls and the tub both have an object style assigned. The tub has a material "Porcelain - White".
The walls around the tub have a material "Finishes - Interior - Wall Ceramic Tile 200 × 200" (white tiles). However the bathtub walls already had a parameter that assigned the material "Hob" The direct assignment overrules the object styles so the "Hob" material will be used. If in the parameters you would change it from "Hob" and set it to "By Category" than the object style would be used "Finishes - Interior - Wall Ceramic Tile 200 × 200".
Now loading the family in the project
You see the instance parameters for the material in the project browser. So with multiple batthubs they could all be made of different materials.
Checking the object style in the project. As this was a clean project the object styles are the same as in the family.
To change the materials for your bathtub, you could change the materials in the properties window.
You also could set them both (in the properties window) to "By Category". Than they would take the material assigned in the "Object Styles"
So in your project something like this has happened. Or the materials have changed in the properties window. Or they are set to "By Category" and there are no materials in the objects styles (or some grey materials).
Please note that the visbility settings (objects styles) and materials in the project overrules the ones in the family. So when you modify the materials in the family editor and reload it into the project the changes will probably not be visble. If the name of the object style or material in the project is the same as in the family the project settings overrule the family ones.
Louis
Please mention Revit version, especially when uploading Revit files.
Visbility is little bit complicated in the beginning because there are many things that influence how object looks like
Starting in the family editor
If you check the objects you see that the batthub walls have a material assigned "Hob" This is the grey 200x200 mm tiles.
Also note that it is an instance parameter so in the project you can change the material of every instance of the bathtub
The tub itself is "By Category". This means it is determined by the object styles
You can see that the bathtub walls and the tub both have an object style assigned. The tub has a material "Porcelain - White".
The walls around the tub have a material "Finishes - Interior - Wall Ceramic Tile 200 × 200" (white tiles). However the bathtub walls already had a parameter that assigned the material "Hob" The direct assignment overrules the object styles so the "Hob" material will be used. If in the parameters you would change it from "Hob" and set it to "By Category" than the object style would be used "Finishes - Interior - Wall Ceramic Tile 200 × 200".
Now loading the family in the project
You see the instance parameters for the material in the project browser. So with multiple batthubs they could all be made of different materials.
Checking the object style in the project. As this was a clean project the object styles are the same as in the family.
To change the materials for your bathtub, you could change the materials in the properties window.
You also could set them both (in the properties window) to "By Category". Than they would take the material assigned in the "Object Styles"
So in your project something like this has happened. Or the materials have changed in the properties window. Or they are set to "By Category" and there are no materials in the objects styles (or some grey materials).
Please note that the visbility settings (objects styles) and materials in the project overrules the ones in the family. So when you modify the materials in the family editor and reload it into the project the changes will probably not be visble. If the name of the object style or material in the project is the same as in the family the project settings overrule the family ones.
Louis
Please mention Revit version, especially when uploading Revit files.
You can just type it "<By Category>" in or select it by clicking on the 3dots
which opens the material browser, where you will find the "By Category" button.
Please note these last two questions are quite basic Revit tasks. If you are not yet familiar with Revit and want to get serioous with it. I would advice get some basic training. There are good books (By Paul F Aubin or the Mastering Series), video courses (lynda.com, Infiniteskills.com) or life courses (have a look in your area). A good basic understanding of Revit will get you much faster up to speed. When you get the concepts down it becomes much more logical and easier to work with it.
Louis
Please mention Revit version, especially when uploading Revit files.
You can just type it "<By Category>" in or select it by clicking on the 3dots
which opens the material browser, where you will find the "By Category" button.
Please note these last two questions are quite basic Revit tasks. If you are not yet familiar with Revit and want to get serioous with it. I would advice get some basic training. There are good books (By Paul F Aubin or the Mastering Series), video courses (lynda.com, Infiniteskills.com) or life courses (have a look in your area). A good basic understanding of Revit will get you much faster up to speed. When you get the concepts down it becomes much more logical and easier to work with it.
Louis
Please mention Revit version, especially when uploading Revit files.
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