blender material error

hello friends, I made a model in blender, but when I render, it looks white even though there is brown material on the pier and bridge legs, and the tip of the tent looks strange. How can I fix it, also sorry for my English :frowning:

Hi and welcome to the BA community. You are not giving us enough information to be able to help you.
Screen shot of your shader setup could help, or a link to download your file.

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it looks like only one of each of the objects in each “thing” (pier, bridge etc) have the material. You cant select all and add a material, you need to add them individually, or select all objects you want w/ that material, having the last one you select (highlighted in light yellow) have the material you want, and copy materials (control+L, Link Materials, i believe)