# Help with rendering

**URL:** <https://forums.chaos.com/t/help-with-rendering/121679>\
**Category:** General\
**Created:** [February 18, 2025, 10:35am UTC](https://forums.chaos.com/t/help-with-rendering/121679 "2025-02-18T10:35:04Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![anders\_karlsson1](https://avatars.discourse-cdn.com/v4/letter/a/13edae/32.png) [@anders\_karlsson1](https://forums.chaos.com/u/anders_karlsson1)\
**Post date:** [February 18, 2025, 10:35am UTC](https://forums.chaos.com/t/help-with-rendering/121679/1 "2025-02-18T10:35:04Z")

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Hi

I try to achive a nice rendered picture of a aluminium profile cut out (see picture). And i need to have it with transparent background.  
But if i render it just with lights its very hard to get it to look good, because the lights are not bouncing at something. If i make a backdrop the product looks better but i dont want the backdrop to show in the png file.. Can i make it transparent but still affect the environment,.?

 ![.png.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/6/5/65061b85096bde16e78387a6972975e35d75c40e.jpeg)

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**Author:** ![konstantin\_chaos](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/konstantin_chaos/32/52929_2.png) [@konstantin\_chaos](https://forums.chaos.com/u/konstantin_chaos)\
**Post date:** [February 28, 2025, 12:11pm UTC](https://forums.chaos.com/t/help-with-rendering/121679/2 "2025-02-28T12:11:01Z")

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Hi,

You can do the following (Option 1):

1. Navigate to the Environment settings
2. Remove the **Background** texture and leave the color black
3. Add a spherical HDR image to the **Reflection, GI and Refraction** slots (as an instance)
4. Render

 ![image.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/a/5/a56e5bb704783da26c8067b4b459fd8676139ff8.png)​

If you save the image now the background is going to be transparent.

Option 2:

1. Remove all environment textures (use black color)
2. Create a **Dome light**
3. Add the spherical environment image in the dome
4. In the **Dome** Options make the Dome **Invisible**
5. Render

Both options are similar.  
However with option 2 you’ll get direct light emission from the Dome instead of relying on pure GI for the indirect lighting.  
Option 2 is better for objects using mostly diffuse materials.  
If you’re mostly dealing with metallic reflections both options are identical.

Hope that helps,  
Konstantin

 ![image.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/3/1/319d308c59d6fa4e0c472133fc60a0c80db9acb1.png)

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<div class="post-metadata">

**Author:** ![kenancakir](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/kenancakir/32/51719_2.png) [@kenancakir](https://forums.chaos.com/u/kenancakir)\
**Post date:** [February 28, 2025, 12:58pm UTC](https://forums.chaos.com/t/help-with-rendering/121679/3 "2025-02-28T12:58:51Z")

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As a note, “affect alpha” option in dome light settings should be uncheck as i know, to get png output..

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<div class="post-metadata">

**Author:** ![konstantin\_chaos](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/konstantin_chaos/32/52929_2.png) [@konstantin\_chaos](https://forums.chaos.com/u/konstantin_chaos)\
**Post date:** [February 28, 2025, 2:32pm UTC](https://forums.chaos.com/t/help-with-rendering/121679/4 "2025-02-28T14:32:23Z")

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> [@kenancakir](#):
>
> As a note, “affect alpha” option in dome light settings should be uncheck as i know, to get png output..

Correct. @kenancakir ​ thank you for the remark.  
​

 ![image.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/0/3/033d77e09c8e461451940cf4c9ac0e5f72b66ba3.png)