Quick answer: Construct 3 Layer Blend Mode (additive, multiply) showing no visible effect on Canvas plugin output? The layer needs Force own texture so the blend has a destination buffer to combine into.

A glow layer set to Additive draws into the same buffer as the background; the additive math produces same colors as the source.

Force Own Texture

Layer properties → Force own texture = Yes. Layer renders to a separate buffer; blend modes apply when compositing onto the layer below.

WebGL Required

Some blend modes require WebGL renderer. If you’re on canvas2D (older browsers, fallback), modes silently no-op.

Per-Object Blend

Object-level Effect Blend property is separate from layer blend. Stacked together: per-object first, then layer blend.

Performance Cost

Force own texture allocates a fullscreen buffer. Many layers with own textures = many buffers = perf hit on mobile. Use selectively.

Verifying

Blend modes produce visible color effects. Additive bloom, multiply darkness, etc. look as designed.

“Blend modes need Force own texture for the destination buffer.”

Reserve Force own texture for VFX layers only — UI and background don’t need it and shouldn’t pay the cost.