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diff --git a/chickadee/graphics/pass.scm b/chickadee/graphics/pass.scm
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+;;; Chickadee Game Toolkit
+;;; Copyright © 2023 David Thompson <dthompson2@worcester.edu>
+;;;
+;;; Licensed under the Apache License, Version 2.0 (the "License");
+;;; you may not use this file except in compliance with the License.
+;;; You may obtain a copy of the License at
+;;;
+;;;    http://www.apache.org/licenses/LICENSE-2.0
+;;;
+;;; Unless required by applicable law or agreed to in writing, software
+;;; distributed under the License is distributed on an "AS IS" BASIS,
+;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+;;; See the License for the specific language governing permissions and
+;;; limitations under the License.
+
+;;; Commentary:
+;;
+;; GPU render passes.
+;;
+;;; Code:
+
+(define-module (chickadee graphics pass)
+  #:use-module (chickadee graphics color)
+  #:use-module (chickadee graphics depth-stencil)
+  #:use-module (srfi srfi-9)
+  #:export (<color-attachment>
+            make-color-attachment
+            color-attachment?
+            color-attachment-view
+            color-attachment-resolve-target
+            color-attachment-clear-color
+            color-attachment-load-op
+            color-attachment-store-op
+
+            <depth+stencil-attachment>
+            make-depth+stencil-attachment
+            depth+stencil-attachment?
+            depth+stencil-attachment-view
+            depth+stencil-attachment-depth-clear-value
+            depth+stencil-attachment-depth-load-op
+            depth+stencil-attachment-depth-store-op
+            depth+stencil-attachment-depth-read-only?
+            depth+stencil-attachment-stencil-clear-value
+            depth+stencil-attachment-stencil-load-op
+            depth+stencil-attachment-stencil-store-op
+            depth+stencil-attachment-stencil-read-only?
+
+            <render-pass>
+            make-render-pass
+            render-pass?
+            render-pass-color-attachments
+            render-pass-depth+stencil-attachment))
+
+(define-record-type <color-attachment>
+  (%make-color-attachment view resolve-target operation)
+  color-attachment?
+  (view color-attachment-view)
+  (resolve-target color-attachment-resolve-target)
+  (operation color-attachment-operation))
+
+(define* (make-color-attachment #:key view resolve-target
+                                (operation (make-color-operation)))
+  (%make-color-attachment view resolve-target operation))
+
+(define-record-type <depth+stencil-attachment>
+  (%make-depth+stencil-attachment view depth-operation stencil-operation)
+  depth+stencil-attachment?
+  (view depth+stencil-attachment-view)
+  (depth-operation depth+stencil-attachment-depth-operation)
+  (stencil-operation depth+stencil-attachment-stencil-operation))
+
+(define* (make-depth+stencil-attachment #:key view
+                                        (depth-operation (make-depth-operation))
+                                        (stencil-operation (make-stencil-operation)))
+  (%make-depth+stencil-attachment view depth-operation stencil-operation))
+
+(define-record-type <render-pass>
+  (%make-render-pass color-attachments depth+stencil-attachment)
+  render-pass?
+  (color-attachments render-pass-color-attachments)
+  (depth+stencil-attachment render-pass-depth+stencil-attachment))
+
+(define* (make-render-pass #:key (color-attachments #())
+                           depth+stencil-attachment)
+  (%make-render-pass color-attachments depth+stencil-attachment))