Create a small example PG please.
please help me，thank you
No worries, help is on the way. I’ll have a look at it just right after my meeting ends. However @Tricotou could get ahead of me 
Add this:
box.renderingGroupId = 1
plane.renderingGroupId = 0
And check out the docs what it is used for if you already don’t know 
A lil bit of homework 
Why do you use occlusion queries on a plane ? 
I think it should be used only for heavy meshes to render, as an optimisation process
Because in other services to use occlusion query, to determine whether Mesh is occluded
I do occlusions on simple stuff as well so I can react in a certain way when the mesh becomes visible/hidden.
I tried, but it wouldn’t work. The color will be overwritten
Is there any way to solve the problem of a lot of green
Ok, so let’s try to solve it once again, slowly, step by step:
We have an issue here, the whole box is green, not just it’s edges (https://playground.babylonjs.com/#Z1OGFX#6)
And here is a PG without the issue - lines 45,46 added
(https://playground.babylonjs.com/#Z1OGFX#7)
Got it?
thank you。Sorry, this is not I wanted。I want to overlay a transparent and occlusionType mesh on the highlightLayer without the problem of large green patches
This will make the box look like it’s on top of the plane
yes yes, but， After I added the occlusion query, it’s no longer possible。
highlightLayer.renderingGroupId = 0
plane.renderingGroupId = 1