createMaterialDemos.lua

local MATERIAL_DEMO_SIZE = 4
local MATERIAL_DEMO_SPACING = 1
local MATERIAL_DEMO_SHAPE = Enum.PartType.Block
local MATERIAL_DEMO_COLOR = Color3.fromRGB(255, 255, 255)
local MATERIAL_DEMO_OFFSET = Vector3.yAxis * MATERIAL_DEMO_SIZE/2

local USE_COLUMNS = true
local MATERIALS_PER_ROW = 12

local createdMaterialDemos = {} do
    local function tryToCreateMaterialDemo(obj: Instance): Instance?
        if not obj:IsA("MaterialVariant") then
            return nil
        end

        if createdMaterialDemos[obj.Name]==nil then
            local newMaterialDemo = Instance.new("Part")
            newMaterialDemo.Name = `MaterialDemo_{obj.Name}`
            newMaterialDemo.Material = obj.BaseMaterial
            newMaterialDemo.MaterialVariant = obj.Name
            newMaterialDemo.Color = MATERIAL_DEMO_COLOR
            newMaterialDemo.Shape = MATERIAL_DEMO_SHAPE
            newMaterialDemo.Size = Vector3.one * MATERIAL_DEMO_SIZE
            newMaterialDemo.BottomSurface = Enum.SurfaceType.Smooth
            newMaterialDemo.TopSurface = Enum.SurfaceType.Smooth
            newMaterialDemo.Anchored = true

            createdMaterialDemos[obj.Name] = newMaterialDemo
            return obj
        end

        return nil
    end

    for _,selectedObject in game.Selection:Get() do
        tryToCreateMaterialDemo(selectedObject)
        for _,descendant in selectedObject:GetDescendants() do
            tryToCreateMaterialDemo(descendant)
        end
    end
end

local newMaterialDemoFolder = Instance.new("Folder")
newMaterialDemoFolder.Name = "MaterialDemos"
newMaterialDemoFolder.Parent = workspace

local demoOffset = Vector2.zero
for materialName,materialDemo in createdMaterialDemos do
    local currentOffset = Vector3.new(demoOffset.X, 0, demoOffset.Y)
    
    materialDemo.CFrame = 
        CFrame.new(MATERIAL_DEMO_OFFSET) * 
        CFrame.new(currentOffset * (MATERIAL_DEMO_SIZE + MATERIAL_DEMO_SPACING))
    
    materialDemo.Parent = newMaterialDemoFolder

    demoOffset += Vector2.xAxis
    
    if not USE_COLUMNS then
        continue
    end
    
    if demoOffset.X > MATERIALS_PER_ROW then
        demoOffset = Vector2.new(0, demoOffset.Y + 1)
    end
end

if demoOffset==Vector2.zero then
    newMaterialDemoFolder:Destroy()
    warn("You have no selected MaterialVariants!")
else
    game:GetService("ChangeHistoryService"):SetWaypoint("Created Material Demos")
end