Sprite Mesh Type: Full Rect vs Tight (Mobile Performance)

[MarekUnity]

I have read that Full Rect will have a lot less triangles whereas Tight will have much more. The advantage to Tight is there will be a lot less overdraw and alpha blending (it doesn’t need to draw/calculate empty alpha pixels.

In general, overdraw is bad for performance on low-end devices and some mobile devices will fall into that category.

I am not sure changing every single sprite in my game to Tight is the best option.

By default when you import your Sprites into Unity, they should have their Mesh type set to “tight” so you shouldn’t have to change anything.

What about images that are square in size and have little to no transparency around the edges

In that case you would probably be better off with a quad. If you want to do some micro-optimisation you could even draw an outline yourself in the Custom Outline section of the Sprite Editor.

Tight mesh type seems to grab parts of adjacent sprites (you can see parts of the other sprites around the edges).

Can you share how your Sprites are laid out in the Sprite sheet?