# Stencil doesn't work when using RenderTarget with calling createDepthStencilTexture **URL:** \ **Category:** Questions\ **Tags:** material\ **Created:** [March 8, 2023, 8:22am UTC](https://forum.babylonjs.com/t/stencil-doesnt-work-when-using-rendertarget-with-calling-createdepthstenciltexture/38846 "2023-03-08T08:22:26Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![newbeea](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/newbeea/32/29263_2.png) [@newbeea](https://forum.babylonjs.com/u/newbeea)\ **Post date:** [March 8, 2023, 8:22am UTC](https://forum.babylonjs.com/t/stencil-doesnt-work-when-using-rendertarget-with-calling-createdepthstenciltexture/38846/1 "2023-03-08T08:22:26Z")
Hi guys I have two questions，thank you so much for any help Q1: I found that stencil doesn’t work when using RenderTarget with calling createDepthStencilTexture [render target stencil | Babylon.js Playground (babylonjs-playground.com)](https://www.babylonjs-playground.com/#B5P4DA#21) uncomment createDepthStencilTexture, the stencil doesn’t work Q2: I want render A in RTT-A，with stencil ref = 1，and render B in RTT-B with ref equal 1。how to share RTT-A’s stencil buffer [render target stencil | Babylon.js Playground (babylonjs-playground.com)](https://www.babylonjs-playground.com/#B5P4DA#23) ---
**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\ **Post date:** [March 8, 2023, 10:44am UTC](https://forum.babylonjs.com/t/stencil-doesnt-work-when-using-rendertarget-with-calling-createdepthstenciltexture/38846/2 "2023-03-08T10:44:12Z")
The default format (5th parameter of `createDepthStencilTexture`) is `TEXTUREFORMAT_DEPTH32_FLOAT`. You should pass a stencil capable format instead (like `TEXTUREFORMAT_DEPTH24_STENCIL8`): > **[Babylon.js Playground](https://www.babylonjs-playground.com/#B5P4DA%2326)** > > Babylon.js playground is a live editor for Babylon.js WebGL 3D scenes Regarding 2/, you can use the `RenderTargetWrapper._shareDepth` function to share the depth/stencil texture: you can’t share the stencil (or depth) only. Here’s how to do it: > **[Babylon.js Playground](https://www.babylonjs-playground.com/#B5P4DA%2328)** > > Babylon.js playground is a live editor for Babylon.js WebGL 3D scenes You need to override the RTT clearing (by adding an observer to `RTT.onClearObservable`) to clear the color buffer only, and not the depth/stencil. ---
**Author:** ![newbeea](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/newbeea/32/29263_2.png) [@newbeea](https://forum.babylonjs.com/u/newbeea)\ **Post date:** [March 8, 2023, 11:31am UTC](https://forum.babylonjs.com/t/stencil-doesnt-work-when-using-rendertarget-with-calling-createdepthstenciltexture/38846/3 "2023-03-08T11:31:46Z")
Awesome! You are incredibly professional! Thank you!!! ---
**Author:** ![newbeea](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/newbeea/32/29263_2.png) [@newbeea](https://forum.babylonjs.com/u/newbeea)\ **Post date:** [March 8, 2023, 12:25pm UTC](https://forum.babylonjs.com/t/stencil-doesnt-work-when-using-rendertarget-with-calling-createdepthstenciltexture/38846/4 "2023-03-08T12:25:10Z")
I have another problem when i use MultiRenderTarget, How are they different? [render target stencil | Babylon.js Playground (babylonjs-playground.com)](https://www.babylonjs-playground.com/#B5P4DA#30) ---
**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\ **Post date:** [March 8, 2023, 2:01pm UTC](https://forum.babylonjs.com/t/stencil-doesnt-work-when-using-rendertarget-with-calling-createdepthstenciltexture/38846/5 "2023-03-08T14:01:57Z")
If you create a multi render target with 2 textures (as you do in the PG), you are supposed to write to the two textures in your fragment shader. Else an error is reported (see the browser console log): ```auto [.WebGL-0000299008C47100] GL_INVALID_OPERATION: Active draw buffers with missing fragment shader outputs. ``` The standard/PBR materials write only to a single texture, so you will have to provide your own shader if you want to use a multi render target with a count \> 1. ---
**Author:** ![newbeea](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/newbeea/32/29263_2.png) [@newbeea](https://forum.babylonjs.com/u/newbeea)\ **Post date:** [March 9, 2023, 2:12am UTC](https://forum.babylonjs.com/t/stencil-doesnt-work-when-using-rendertarget-with-calling-createdepthstenciltexture/38846/6 "2023-03-09T02:12:50Z")
My bad, I’m sorry I didn’t notice the console It’s working now [render target stencil | Babylon.js Playground (babylonjs-playground.com)](https://www.babylonjs-playground.com/#B5P4DA#31) Thank you again~