DrawImageProjected giving off unknown error

Bug Reports Engine Bugs
,
#1

I’m trying to project an image onto the top surface of an EditableMesh (the EM is just a cube)

local EditableImage = AssetService:CreateEditableImage({Size = Vector2.new(512,512)})
local BrushImage = AssetService:CreateEditableImageAsync(Content.fromUri("rbxassetid://130930689780864"), {Size = Vector2.new(512,512)})
	
local projectionParams: ProjectionParams = {
	Direction = Vector3.new(0, 1, 0),
	Position = Vector3.new(0, 0, 0),
	Size = Vector3.new(1, 1, 1),
	Up = PreviewMesh.CFrame:VectorToObjectSpace(Vector3.new(0, 1, 0)),
}

local localBrushConfig: BrushConfig = {
	Decal = BrushImage,
	ColorBlendType = Enum.ImageCombineType.BlendSourceOver,
	AlphaBlendType = Enum.ImageAlphaType.Default,
	BlendIntensity = 1,
	FadeAngle = 90.0
}
	
EditableImage:DrawImageProjected(PreviewMesh, projectionParams, localBrushConfig) -- error

This is the error I get

Missing or null attribute in drawImageProjected!

Worth noting, that the example provided in the announcement gives the same error

local AssetService = game:GetService("AssetService")
local editableImage = AssetService:CreateEditableImage({Size = Vector2.new(512,512),})
local brushImage = AssetService:CreateEditableImage({Size = Vector2.new(512,512),})
 
local relativePos = meshPart.CFrame:PointToWorldSpace(raycastHitPos)
local direction = (game.Workspace.CurrentCamera.CFrame.Position - relativePos).Unit
 
local projectionParams: ProjectionParams = {
   	Direction = meshPart.CFrame:VectorToObjectSpace(direction),
   	Position = meshPart.CFrame:PointToObjectSpace(relativePos),
   	Size = Vector3.new(1, 1, 1),
   	Up = meshPart.CFrame:VectorToObjectSpace(Vector3.new(0, 1, 0)),
}
 
local localBrushConfig: BrushConfig = {
   	Decal = brushImage,
   	ColorBlendType = Enum.ImageCombineType.BlendSourceOver,
   	AlphaBlendType = Enum.ImageAlphaType.Default,
   	BlendIntensity = 1,
   	FadeAngle = 90.0
}
 
editableImage:DrawImageProjected(meshPart, projectionParams, localBrushConfig)

Expected behavior

What the announcement post seemed to show off

#2

what is the type and value of PreviewMesh?
It has to be the editablemesh that you are projecting to

#3

EDIT
Figured what was wrong, I was doing the Meshpart, not the EditableMesh. But this

local Cube = {}
Cube.__index = Cube

local AssetService = game:GetService("AssetService")

local function AddSharpQuad(editableMesh, vertex0, vertex1, vertex2, vertex3)
	-- Add a new normal for this face
	local Normal = editableMesh:AddNormal()

	-- Create two triangles to form the quad
	local Triangle1 = editableMesh:AddTriangle(vertex0, vertex1, vertex2)
	editableMesh:SetFaceNormals(Triangle1, { Normal, Normal, Normal })

	local Triangle2 = editableMesh:AddTriangle(vertex0, vertex2, vertex3)
	editableMesh:SetFaceNormals(Triangle2, { Normal, Normal, Normal })
end

function Cube.new()
	local self = setmetatable({}, Cube)
		
	return self
end

function Cube:CreateCube(position, size)
	position = position or Vector3.new(0, 0, 0)
	size = size or Vector3.new(1, 1, 1)

	-- Create empty EditableMesh
	local EditableMesh = AssetService:CreateEditableMesh()

	-- Add vertices for a unit cube
	local Vertex1 = EditableMesh:AddVertex(Vector3.new(0, 0, 0))
	local Vertex2 = EditableMesh:AddVertex(Vector3.new(1, 0, 0))
	local Vertex3 = EditableMesh:AddVertex(Vector3.new(0, 1, 0))
	local Vertex4 = EditableMesh:AddVertex(Vector3.new(1, 1, 0))
	local Vertex5 = EditableMesh:AddVertex(Vector3.new(0, 0, 1))
	local Vertex6 = EditableMesh:AddVertex(Vector3.new(1, 0, 1))
	local Vertex7 = EditableMesh:AddVertex(Vector3.new(0, 1, 1))
	local Vertex8 = EditableMesh:AddVertex(Vector3.new(1, 1, 1))

	-- Add the six faces of the cube
	AddSharpQuad(EditableMesh, Vertex5, Vertex6, Vertex8, Vertex7) -- front
	AddSharpQuad(EditableMesh, Vertex1, Vertex3, Vertex4, Vertex2) -- back
	AddSharpQuad(EditableMesh, Vertex1, Vertex5, Vertex7, Vertex3) -- left
	AddSharpQuad(EditableMesh, Vertex2, Vertex4, Vertex8, Vertex6) -- right
	AddSharpQuad(EditableMesh, Vertex1, Vertex2, Vertex6, Vertex5) -- bottom
	AddSharpQuad(EditableMesh, Vertex3, Vertex7, Vertex8, Vertex4) -- top

	-- Clean up unused normals
	EditableMesh:RemoveUnused()

	
	
	-- Draw texture onto faces
	local EditableImage = AssetService:CreateEditableImage({Size = Vector2.new(512,512)})
	local BrushImage = AssetService:CreateEditableImageAsync(Content.fromUri("rbxassetid://130930689780864"), {Size = Vector2.new(512,512)})

	local projectionParams: ProjectionParams = {
		Direction = Vector3.new(0, 1, 0),
		Position = Vector3.new(0, 0, 0),
		Size = Vector3.new(1, 1, 1),
		Up = Vector3.new(0, 1, 0),
	}

	local localBrushConfig: BrushConfig = {
		Decal = BrushImage,
		ColorBlendType = Enum.ImageCombineType.BlendSourceOver,
		AlphaBlendType = Enum.ImageAlphaType.Default,
		BlendIntensity = 1,
		FadeAngle = 90
	}
	
	EditableImage:DrawImageProjected(EditableMesh, projectionParams, localBrushConfig)
	
	-- Create the preview MeshPart
	local PreviewMesh = AssetService:CreateMeshPartAsync(Content.fromObject(EditableMesh))
	PreviewMesh.Anchored = true
	PreviewMesh.Position = position
	PreviewMesh.Size = size
	PreviewMesh.Parent = workspace
	
	return PreviewMesh, EditableMesh
end

return Cube

Causes studio to completely crash

#4

UV information seems to be missing from this editable mesh setup

#5

if i do

print(EditableMesh:GetUVs)

it does print the UVs, i assume they all correct?

Hoping for something in the future to make setting this all up easier to visualize, as these UV numbers mean nothing to me :person_shrugging: they seem like just random ids