I created a renderTarget to render texture from camera pointing to a 3D Screen and assigned the texture to an Image on 2D Screen of UI Layer.
On 3D Screen , it is a Image Element with Material , and the material contain Opacity Map, Emissive Map and Diffuse Color, On UI, there have different buttons to change the opacity map texture, emissive map texture and diffuse color
It works fine on desktop and android google chrome, as well as my iPad w/ iOS 15.3.1 , but on iPhone 15.4.1 , no matter on Safari or Google Chrome , it was only work for once of any texture changes. after that the render target will no longer clear the depth and keep overlapping.
It pretty urgent cause the project is gonna launch on 20 Apr and i have no idea how to fix this , any suggestion ?