@ThaJay technically, the behavior you are experiencing is correct. Even though your cursor is inside renderScene, it is also inside the Navigator tag, the return statement, and the top-level curly braces, which is why all those are highlighted.

All of this is controlled by your color scheme. Here is how your code looks using my Neon color scheme and XML syntax highlighting (I wasn't sure what templating language you were using...), with just "draw_active" set in the preferences and the cursor at the same point as yours was:

If we look at the source of Neon.tmTheme in the global settings section, you'll find three relevant keys: activeGuide, guide, and stackGuide:

I think what you are looking for is activeGuide - it highlights the immediate block you're in, while stackGuide highlights all of the other blocks you're in above the immediate one. (guide is the color used when "draw_all" is in your preferences, it defaults to the comment scope if not present.)

Thank you for the concise answer. I did not know this was part of themes, but you gave me everything I need to change this and ask the theme creator about it.
I knew about the 'draw_normal' + 'draw_active' option array. I do think it's a bit weird SublimeText3 does not offer the third option in the indent_guide_options setting.