I want to change all the red color to a darker red? how I do it?
Go to the In Model materials, select the red color and then the Edit tab. Change the color to be what you want it to be.
Right click on one of the red faces, choose Select>All by same material. Activate the Bucket tool (B keyboard shortcut) and choose your new desired colour. Click on one of the selected faces.
Voila!
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