How to get image id from decal id?

[duckwithhair5 (puchaina)]

I’m making a surfaceGui phone on studio and one of the features in the settings app is that you can change your wallpaper. To do this the player enters a decal asset id into a textbox which updates the wallpapers “Image” property (the wallpaper is an image label). However no matter what decal ID I use it never works. Even when trying “rbxassetid://” instead of “http://www.roblox.com/asset/?id=”. I noticed when you enter a decal asset ID into an ImageLabel through studio it works and it automatically changes the ID to a different ID which I believe is part of the problem since ImageLabel “Image” properties don’t get corrected while “in game”. I tried seeing if marketplace service had something to automatically correct the decal ID to a working ImageLabel ID but there was nothing. Here is the problem in the code:

local homescreen = script.Parent.Parent.Parent.Parent.HomeScreen

script.Parent.changeWallpaper.MouseButton1Click:Connect(function()
	--[[when you try changing the wallpaper it turns into a white screen
	but when you enter the id through roblox studio it changes fine but the id gets corrected to a different id]]--
	homescreen.Image = "http://www.roblox.com/asset/?id=".. script.Parent.assetid.Text
end)

[Captain_Teach]

Can you give an example of an ID automatically changing? I’ve never experienced this personally (except package to bundle IDs).

[sjr04 (uep)]

You’ll want to use a function like this:

It's Impossible to Get an Image ID From a Decal ID

Does inserting the decal and reading its ID not work? This is what we do internally for the Properties widget when an assetId is pasted in. For Lua it would look something like local InsertService = game:GetService("InsertService") local MarketplaceService = game:GetService("MarketplaceService") function getImageIdFromDecal(decalId) local assetInfo = MarketplaceService:GetProductInfo(decalId, Enum.InfoType.Asset) assert(assetInfo.IsPublicDomain) assert(assetInfo.AssetTypeId == Enum.AssetT…

I would also recommend supporting the feature request, if you want this to be a native feature.

[IllusionBacon]

You probably need to get the asset image id and not the decal id. Use rbxthumb:// for that.
Try to use something like this:

homescreen.Image = string.format("rbxthumb://type=Asset&id=%s&w=420&h=420", script.Parent.assetid.Text)