Small black squares in 3d games by retroarch

First of all, I would like to thank you very much for the RetroBat project.

And since I love this project, I won't give it up for anything.

I've been trying to find the reason for it for weeks now and I decided to go to the forum and ask for your help.

For some reason, 3D games, run by Retrobat via Retroarch, are showing small black squares (sometimes white) and I don't know why (it looks like a video artifact).

Could someone help me?

Ikagura by Sega


Crazy Taxy by Dreamcast

Hello,
Is it only dreamcast games ?

Hello

What is the specification of your computer ?

Hello, thank you for your attention.

In this case, I have this problem with Dreamcast games opened by Retroarch through Retrobat.

If I open the game Crazy Taxi through Redream, this problem does not occur.

In the example above, there is also the game Ikagura published by Sega (Sega Naomi ROM), using the Sega - Dreamcast/Naomi (Flycast) bios in retroarch.

My computer specifications are:

Processor: Rysen 7 5800x
Ram Memory: 64gb - XPG Spectrix 3200mhz
OS: Windows 11 23H2
Video Card: RTX 3070 Gainward 8gb
Various HDs and SSDs - Retrobat is on a 4tb Seagete Barracuda HD 5400rpm

Try and change an option to per-pixel or per-strip, don't remember exactly the option

tartifless wrote:Try and change an option to per-pixel or per-strip, don't remember exactly the option

Hello, thank you very much!

With your tip I got to the SHADER SET option, changed it to SCALEHQ and it started working perfectly.

Strangely, if I leave it on AUTO or NONE, the error squares appear.

Hi,

What were the previous non-working settings ?

tartifless wrote:Hi,

What were the previous non-working settings ?

everything was on AUTO, I only changed the Shader Set.

I tested each shader one by one, and I noticed that when I leave it on AUTO or NONE the squares appear.

Did you see the message on the bottom telling you your rom is too old also ?

I am unable to reproduce this, tried many roms, many settings, nothing can make these squares appear ...

tartifless wrote:I am unable to reproduce this, tried many roms, many settings, nothing can make these squares appear ...

Is there anything I can do to help (send a copy of my installation?) to help identify the problem or can we follow the instructions mentioned above?

I'm glad to have this option to play with other shaders.