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A copy of Doom2.wad and Ultimate Doom Builder is all you need for now, start there, experiment, make some maps, suck at it till you get good.

After you got mapping sorted out, get SLADE editor, check the zdoom wiki (it'll be your best friend throughout your modding journey) and start writing your own custom entities using original ones as a template, the more you learn to wrangle the code, the more you'll know how to make completely custom stuff as you go on.

I also suggest you to join this discord group called "The Entryway" created by James Paddock of Adventures Of Square fame, there's a lot of sections where you can share your work, ask for people to playtest, ask for help in case you're stuck on something. Here's the link: https://discord.gg/Ascc59b


James also has made a tutorial that teaches you how to make a simple doom map:

If you search for doom modding tutorials on youtube, there's an endless amount of videos you can watch to get you started.

it says this SYSTEM INFO OS: Microsoft Windows 10 Home Single Language GPU: Intel(R) HD Graphics 3000 UDB: R4188 Platform: x64

EXCEPTION DETAILS Could not create render device: No OpenGL 3.2 support found (error code 1282) em CodeImp.DoomBuilder.Rendering.RenderDevice.CreateDevice() na c:\build\UltimateDoomBuilder\Source\Core\Rendering\RenderDevice.cs:linha 144 em CodeImp.DoomBuilder.Rendering.RenderDevice..ctor(RenderTargetControl rendertarget) na c:\build\UltimateDoomBuilder\Source\Core\Rendering\RenderDevice.cs:linha 50 em CodeImp.DoomBuilder.MapManager.InitializeNewMap(MapOptions options) na c:\build\UltimateDoomBuilder\Source\Core\General\MapManager.cs:linha 270 em CodeImp.DoomBuilder.General.NewMap() na c:\build\UltimateDoomBuilder\Source\Core\General\General.cs:linha 1141 em CodeImp.DoomBuilder.Actions.Action.Begin() na c:\build\UltimateDoomBuilder\Source\Core\Actions\Action.cs:linha 269 em CodeImp.DoomBuilder.Actions.ActionManager.InvokeAction(String actionname) na c:\build\UltimateDoomBuilder\Source\Core\Actions\ActionManager.cs:linha 424 em CodeImp.DoomBuilder.Windows.MainForm.InvokeTaggedAction(Object sender, EventArgs e) na c:\build\UltimateDoomBuilder\Source\Core\Windows\MainForm.cs:linha 462 em System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e) em System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e) em System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e) em System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e) em System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea) em System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea) em System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) em System.Windows.Forms.Control.WndProc(Message& m) em System.Windows.Forms.ToolStrip.WndProc(Message& m) em System.Windows.Forms.ToolStripDropDown.WndProc(Message& m) em System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

No OpenGL 3.2 support found means that your computer is too old to run Gzdoom and lacks the required horsepower.

You can try LZDoom instead, but it's untested, probably won't look correct, but it might run.

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that appeared when i run ultimate doom builder, and it also appears when i run SLADE