diff --git a/core/config/project_settings.cpp b/core/config/project_settings.cpp
index c65a2a5bc6c..28fbc785011 100644
--- a/core/config/project_settings.cpp
+++ b/core/config/project_settings.cpp
@@ -1250,6 +1250,9 @@ ProjectSettings::ProjectSettings() {
GLOBAL_DEF_INTERNAL("application/config/features", PackedStringArray());
GLOBAL_DEF_INTERNAL("internationalization/locale/translation_remaps", PackedStringArray());
GLOBAL_DEF_INTERNAL("internationalization/locale/translations", PackedStringArray());
+
+ GLOBAL_DEF("rendering/textures/vram_compression/minimum_size", 512);
+ custom_prop_info["rendering/textures/vram_compression/minimum_size"] = PropertyInfo(Variant::INT, "rendering/textures/vram_compression/minimum_size", PROPERTY_HINT_RANGE, "16,16384,1");
}
ProjectSettings::~ProjectSettings() {
diff --git a/doc/classes/ProjectSettings.xml b/doc/classes/ProjectSettings.xml
index 6fd3f9f9fc0..2c28a297cf6 100644
--- a/doc/classes/ProjectSettings.xml
+++ b/doc/classes/ProjectSettings.xml
@@ -1933,6 +1933,11 @@
If [code]true[/code], the texture importer will import VRAM-compressed textures using the S3 Texture Compression algorithm. This algorithm is only supported on desktop platforms and consoles.
[b]Note:[/b] Changing this setting does [i]not[/i] impact textures that were already imported before. To make this setting apply to textures that were already imported, exit the editor, remove the [code].godot/imported/[/code] folder located inside the project folder then restart the editor (see [member application/config/use_hidden_project_data_directory]).
</member>
+ <member name="rendering/textures/vram_compression/minimum_size" type="int" setter="" getter="" default="512">
+ When a texture is detected as used in 3D in the editor, only enable VRAM compression if its size is greater than or equal to [code]minimum_size * minimum_size[/code] pixels. This is done to prevent reducing texture quality when it doesn't save much video memory, especially for pixel art.
+ For non-square textures, the pixel count is used. For example, with [member rendering/textures/vram_compression/minimum_size] set to [code]512[/code], a 512×512 texture will use VRAM compression, while 256×256 textures, 256×512 and 1024×64 textures will keep their existing compression mode (Lossless by default).
+ [b]Note:[/b] This project setting only affects textures that are detected to be used in 3D at a given time. Textures that were already imported will not be affected by changes to this setting. To force 3D detection to occur again, select a texture in the FileSystem dock, change its Detect 3D import option in the Import dock to [b]VRAM Compressed[/b] or [b]Basis Universal[/b] then click [b]Reimport[/b].
+ </member>
<member name="rendering/vulkan/descriptor_pools/max_descriptors_per_pool" type="int" setter="" getter="" default="64">
</member>
<member name="rendering/vulkan/rendering/back_end" type="int" setter="" getter="" default="0">
diff --git a/editor/import/resource_importer_texture.cpp b/editor/import/resource_importer_texture.cpp
index deb30478649..a055dca8ada 100644
--- a/editor/import/resource_importer_texture.cpp
+++ b/editor/import/resource_importer_texture.cpp
@@ -65,6 +65,15 @@ void ResourceImporterTexture::_texture_reimport_3d(const Ref<CompressedTexture2D
}
singleton->make_flags[path].flags |= MAKE_3D_FLAG;
+
+ // For small textures, don't use VRAM compression as it decreases quality too much compared to the memory saved.
+ // The minimum size for VRAM compression is defined on each axis.
+ // It is then squared to handle non-square input texture sizes in a more human-readable manner.
+ const float minimum_size = float(GLOBAL_GET("rendering/textures/vram_compression/minimum_size"));
+ if (p_tex->get_width() * p_tex->get_height() >= int(Math::pow(minimum_size, 2.0f) - CMP_EPSILON)) {
+ // Texture is larger than `minimum_size × minimum_size` pixels (if square).
+ singleton->make_flags[path].flags |= MAKE_VRAM_COMPRESS_FLAG;
+ }
}
void ResourceImporterTexture::_texture_reimport_normal(const Ref<CompressedTexture2D> &p_tex) {
@@ -103,7 +112,33 @@ void ResourceImporterTexture::update_imports() {
bool changed = false;
- if (E.value.flags & MAKE_NORMAL_FLAG && int(cf->get_value("params", "compress/normal_map")) == 0) {
+ if (E.value.flags & MAKE_3D_FLAG && bool(cf->get_value("params", "detect_3d/compress_to"))) {
+ if (E.value.flags & MAKE_VRAM_COMPRESS_FLAG) {
+ // Texture is large enough to benefit from VRAM compression.
+ const int compress_to = cf->get_value("params", "detect_3d/compress_to");
+ String compress_string;
+ if (compress_to == 1) {
+ cf->set_value("params", "compress/mode", COMPRESS_VRAM_COMPRESSED);
+ compress_string = "VRAM Compressed (S3TC/ETC/BPTC)";
+ } else if (compress_to == 2) {
+ cf->set_value("params", "compress/mode", COMPRESS_BASIS_UNIVERSAL);
+ compress_string = "Basis Universal";
+ }
+ print_line(vformat(TTR("%s: Texture detected as used in 3D. Enabling mipmap generation and setting the texture compression mode to %s."), String(E.key), compress_string));
+ } else {
+ print_line(vformat(TTR("%s: Small texture detected as used in 3D. Enabling mipmap generation but not VRAM compression."), String(E.key)));
+ }
+
+ cf->set_value("params", "mipmaps/generate", true);
+ cf->set_value("params", "detect_3d/compress_to", 0);
+
+ changed = true;
+ }
+
+ if (E.value.flags & MAKE_NORMAL_FLAG && int(cf->get_value("params", "compress/normal_map")) == 0 && int(cf->get_value("params", "compress/mode")) != COMPRESS_LOSSLESS) {
+ // Normal map compression is not available for textures with Lossless compression.
+ // This is ignored in the importer, but printing a message about normal map compression
+ // being enabled in this case is misleading.
print_line(vformat(TTR("%s: Texture detected as used as a normal map in 3D. Enabling red-green texture compression to reduce memory usage (blue channel is discarded)."), String(E.key)));
cf->set_value("params", "compress/normal_map", 1);
changed = true;
@@ -116,22 +151,6 @@ void ResourceImporterTexture::update_imports() {
changed = true;
}
- if (E.value.flags & MAKE_3D_FLAG && bool(cf->get_value("params", "detect_3d/compress_to"))) {
- const int compress_to = cf->get_value("params", "detect_3d/compress_to");
- String compress_string;
- cf->set_value("params", "detect_3d/compress_to", 0);
- if (compress_to == 1) {
- cf->set_value("params", "compress/mode", COMPRESS_VRAM_COMPRESSED);
- compress_string = "VRAM Compressed (S3TC/ETC/BPTC)";
- } else if (compress_to == 2) {
- cf->set_value("params", "compress/mode", COMPRESS_BASIS_UNIVERSAL);
- compress_string = "Basis Universal";
- }
- print_line(vformat(TTR("%s: Texture detected as used in 3D. Enabling mipmap generation and setting the texture compression mode to %s."), String(E.key), compress_string));
- cf->set_value("params", "mipmaps/generate", true);
- changed = true;
- }
-
if (changed) {
cf->save(src_path);
to_reimport.push_back(E.key);
diff --git a/editor/import/resource_importer_texture.h b/editor/import/resource_importer_texture.h
index 7def2d4f77d..e65c15ae785 100644
--- a/editor/import/resource_importer_texture.h
+++ b/editor/import/resource_importer_texture.h
@@ -54,8 +54,9 @@ public:
protected:
enum {
MAKE_3D_FLAG = 1,
- MAKE_ROUGHNESS_FLAG = 2,
- MAKE_NORMAL_FLAG = 4
+ MAKE_VRAM_COMPRESS_FLAG = 2,
+ MAKE_ROUGHNESS_FLAG = 4,
+ MAKE_NORMAL_FLAG = 8,
};
Mutex mutex;